Title: The Wonder Island Boys: The Mysteries of the Caverns
Author: Finlay, Roger Thompson
Language: English
As this book started as an ASCII text book there are no pictures available.


*** Start of this LibraryBlog Digital Book "The Wonder Island Boys: The Mysteries of the Caverns" ***

This book is indexed by ISYS Web Indexing system to allow the reader find any word or number within the document.

MYSTERIES OF THE CAVERNS***


The Wonder Island Boys

THE MYSTERIES OF THE CAVERNS

by

ROGER T. FINLAY

Illustrated



The New York Book Company
New York
Copyright 1914



[Illustration: _"The professor was reading the scrap, and silently
handed it to George"_]



CONTENTS


  I. MYSTERIOUS DISAPPEARANCE OF THE TEAM

     The runaway team. Circumstances leading up to the present
     condition. The singular occurrences. Examining the tree. The search
     for the yaks. Red Angel as a scout. On the tracks. Losing the
     trail. Red Angel's discovery. The wrecked wagon. The lost weapons
     and ammunition. Breaking in new steers. The planting program.
     Different plants and soils. Prospecting for ores and vegetation.
     Discussing hunting trip. How people of different countries select
     soils. Wild fruit and vegetables. Lessons from the actions of their
     animals. Propagation of fruit and vegetables. Chemical changes

 II. WORKING ON THE NEW BOAT

     Determine to bring in the newly discovered lifeboat. Trip to South
     River. Finding the broken yoke of their team. Recovering the
     lifeboat. Uses for the bolo. Decision to row the boat around the
     point. Making more guns. Preparing new tools. Alloys and their
     uses. Hardness of metal. Bronze. Ancient guns. Manganese. Making
     stocks for the guns. Commencing the hull of the new boat. Size of
     the vessel. About shape or form of hulls. Momentum. Resistance. Red
     Angel's attempt to whistle. Amusing performance. Teaching Red Angel
     accomplishments. Vibration, the universal force.

III. THE HIDEEN MESSAGE

     The new yoke for the yaks. Some of the mysteries. Discussion
     concerning future discoveries. Rainbows. Musical pitch and colors.
     Reflection and refraction. Riding the yaks. Completing some of the
     guns. The trip after the wrecked wagon. Finding their runaway team.
     Accounting for their disappearance. Prospecting. Sugar cane
     discovered. Sorghum. The Tamarisk. Rigging up the lifeboat with
     sails. Discovery of a hidden message in the lifeboat. Examining the
     place where it was found. Determining the time when the message was
     written. Rushing preparation of guns and ammunition. Galena. Lead.
     Getting rid of the sulphur. Making bullets.

 IV. THE TERRIBLE MONSOONS

     Completing the guns. Description of the new ones. Polishing grit.
     Emery. Corundum. Laying the keel of the big boat. Terrible winds.
     The monsoons. Trade winds. Length of summers north and south of the
     Equator. Disappearance of the flag from Observation Hill. George
     and Angel's hunt for the flag. Disappointment. Angel finding the
     flag. Angel's laugh. Facial expression in animals. Brass. The form
     of bullets. Why pointed at one end and hollow in the other. Rifling
     guns. Spiral movement. Molds for castings. The Professor's desire
     to fully explore the cave. Weaving the sails for the new boat.
     Angel's work on the loom.

  V. THE VOYAGE FOR THE BENEFIT OF ANGEL, AND THE DISCOVERY

     Completing the hull of the new boat. Making manilla rope. Decide to
     take Angel along. Enticing him aboard. His consternation. Rounding
     the cliffs. Discovering their first boat among debris. Taking it
     along as a trailer. Sailing up Cataract River. Evidence that their
     boat had been used by some one. Proof of its use by the natives.
     One of the signs of civilization. Leverage. Fulcrum. Mechanical
     powers. Delay of voyage owing to weather. Tourmaline. Harry's
     invention. The bamboo tubes. Testing how fast the guns could be
     loaded and fired. Cartridges. The marine works. The boats. Three
     cheers for the new ship.

 VI. THE GRUESOME FINDS IN THE CAVE

     The cave. Taking the boat to explore the interior. The air pocket.
     A board for charting the cave. The boat on the wagon. Entering the
     cave. The lights. Returning for the boat. The peculiar noise at the
     cave entrance. Methods for searching the cave. The domed chamber.
     Making a circuit within it. The outlet. The second chamber. The
     chalk icicles. Limestone. Volcanic action. Carbonic acid, and what
     it produced. The caves of the world. What is learned in searching
     caves. Their archaeological knowledge. A peculiar formation in the
     large chamber. A platform within a recess. Skulls and skeletons.
     Ancient weapons. Evidences of a terrible conflict. Musket balls.
     Dirks and unknown forms of weapons. Singular copper receptacles.
     Curiously wrought knives. Articles of furniture. Decayed clothing.
     Kitchen utensils. Why the cave takes care of the smoke.

VII. THE TREASURES OF THE CAVE

     The couch in the recess. Chests of gold. A pirates' lair. The
     ancient coins. Peculiar articles of ornament. The lid with mocking
     lock. Rings; bracelets. The buccaneers. The sermon. Ghastly relics.
     A perceptible movement in the atmosphere. Startling supposition. A
     possible outlet in the side of the hill. The slab of carbonate. The
     writing on it. An accident and the finding of other skeletons. The
     light shining into the cave. Discovery of the outlet. View of the
     cataract from the opening in the hillside. The boat in the cave.
     Taking it out by the hillside opening. The Professor's search.
     Return of the boys with the team. Re-enter the cave. The Professor
     lost. Hunting in the unknown passages. Return of the Professor.
     Taking two of the skeletons to the laboratory.

VIII. REMOVING THE VESSELS FROM THE CAVERNS

     Completion of the boat. Making a trial voyage. Rounding the cliffs.
     Trip to the south. The forests and the mountains. On the south
     coast. A raging storm. Seasickness and dizziness at great heights.
     The calcareous slab from the cave. The letters on it. Photography.
     Reagents. Photographic light. X-rays. Taking the copper vessels
     from the cave. Gathering up the bones. Evidences of the strife.
     Spanish inscriptions. Gold bullion. Silver ornaments and vessels.
     Decayed chests. The coins. Peculiar guns. Non-effective powder.
     Disappearance of Angel. Return of Angel with a rusted modern gun.
     Iron or steel guns. Powder as a factor in making weapons.

 IX. MAKING ELECTRICITY

     Their present condition. What they had accomplished. Working for
     love. Contemplating the hoard in the cave. Selfishness at the
     bottom of the pirates' lives. Gathering sugar cane. Honey, and its
     uses in ancient times. Beets and various tubers. Fattening
     properties. Nitrogenous matter. The load of cane. Making a sugar
     mill. Lime in sugar-cane juice. Clarifying sugar. A candy pulling.
     Granulating sugar. The earth as a magnet. Electricity. Positive and
     negative. Magnetic poles. Likes and unlikes. Making a magnet.
     Retaining magnetism in a bar.

  X. STARTING ON THE VOYAGE TO THE WEST

     A barometer. Air pressure. A compass. The atmosphere. Dry weather.
     Observing weather conditions. Providing compartments in the boat
     for provisions. Bedding. Water supply. Faith. Preparing a tablet
     for the Cataract. A terrific storm. A delayed departure. How delays
     have often proved valuable to investigators. Starting the voyage to
     the west. Striking a course. Observations on speed. Going with the
     wind. Tacking. Angles of incidence. The action of air on a surface.
     Determining the pressure of air by its velocity. Flying machines.
     Time and speed in a vessel. Qualities necessary in a sailor.

 XI. A TERRIBLE VOYAGE AND THE SHIPWRECK

     The shadows of night. Recalling memories of their shipwreck. The
     charting board. Cardinal points of the compass. How direction
     traveled is laid out on the chart. Measurement by angles. A weary
     night. The watches. The wind changing. The second day. Cliffs
     beyond. Sailing against the wind. Rounding the northern point. The
     fourth day. The increasing gale. Night. The lights to the south.
     The gale turning to a storm. Driven back. A night without sleep. An
     appalling monsoon. Springing a leak. The Professor exhausted.
     Danger ahead. The cliffs. A maelstrom in sight. Averting the
     danger. Recovery of the Professor. Steering for shore. Striking the
     beach. The vessel shattered. Stranded miles from home. Taking up
     the march. Putting an inscription on the boat. Nearing home.

XII. THE RETURN TRIP. THE ORANG-OUTANS

     The blackened fire space. Discovery of their own camp in the
     forest. An adventure in the woods. A huge bear. George's shot.
     Charging the Professor, and his shot. Attacking George. Safety
     behind a fallen tree. Search for the luggage. The cries of Angel.
     The bear finding their packages. The bear making use of their
     things. What they had left. The yellow pear. Guava. The coffee
     tree. Cherries. Gathering coffee berries. How Angel made himself
     understood. His excitement. The discovery of a number of
     orang-outans. Red Angel visits them. He is not welcomed. Return of
     the animal. The clearing in the woods. Recalling the fight of the
     bears over the honey.

XIII. THE STRANGE VISITOR

     The flag on Observation Hill. Approaching Cataract. The alarm by
     Red Angel. The house intact. Discovery of a man at the stable. His
     peculiar actions. Lost memory. Aphasia. Unable to speak.
     Recognizing the signal flag on the strange man. Provided with
     clothing. A peculiar malady. The instinct of self-preservation.
     Going with George to Observation Hill. The actions of a sailor. The
     stranger visits the workshop. Expert with the use of tools.
     Projecting an exploring trip by land. Naming the stranger John.
     Startled at sound of the name. Mechanically performing work.
     Examining the skulls.

XIV. AN EXCITING TRIP TO THE FALLS

     The food supply. Butter. Cream. Centrifugal motion. Difference in
     specific gravity between cream and milk. Making a cream separator.
     Vegetables. Onions. Chives. The stranger as a prospector. Procuring
     samples. Peculiarities of his malady. An exciting encounter with a
     bear. John's skill as a hunter. Another honey tree. Killed with a
     spear. The bear pelt. Visiting the falls. Action to indicate that
     John recognizes the falls.

 XV. THE STORY OF THE CAVE

     Mystery about John. Humanity's search. The desire to know and
     acquire. Gathering supplies for an extended trip by land. The boys
     visit the cave. Determine to search the chamber visited by the
     Professor. Gorgeous calcareous hangings. The ghosts of past
     centuries. Gold and silver vessels. Skeletons. A recess. A row of
     chests. Spanish guns. The chained skeletons in the recess. An
     arsenal. The struggle. Locked in the embrace of death. Ancient
     origin of the cave. Paleontology. Stone and bronze ages. Atlantis,
     the great continent in the Atlantic, which disappeared. Story of
     the Egyptian priests. The actinic rays. Purifying action of
     sunlight. Bacteria. Glass houses. The eye. How it expresses
     character. Laughter. How it brightens the eye. Fishhooks. A fishing
     party. The salmon.

XVI. MUSIC AND ANIMALS

     Preserving fish. Why heat is used. The use of tin for cans. Music.
     The violin made by the boys. Violin strings; what they are made of.
     How they are prepared and treated. The concert. How the music
     affected Red Angel. John enraptured. How it touched him. The change
     in his eyes. The field mouse. How different animals are moved by
     music. The lion. Hippopotamus. Tigers. Monkeys. Momentary flashes
     of intelligence in John. Building a new wagon. Finding and making
     paint. Lead. Fermentation. Flax. Driers. Turpentine. Synthetic
     food. Analysis. Tubes for powder. Completing the guns. Stocking the
     wagon with provisions. Starting on the trip. Jack and Jill. The
     sixth trip.

XVII. THE TRIP THROUGH THE DENSE FOREST

     The trip along Cataract River. The great forest. How Angel
     traveled. Reaching South River. Discovering a second falls. Where
     the debris on a seashore comes from. The jungle. Leaving the river.
     The two animals in the night. The camp aroused. A fight in the
     dark. The puma. The frightened team. The injured yak. Animal
     language. The panther. Trying to avoid the forest. Growing denser.
     John and Harry scouting through the forest. Blazing a trail. The
     hidden luncheon. End of the forest. Returning to the wagon. The
     noise in their path. The wagon following the trail. The injured yak
     improving.

XVIII. SEEING THE FIRST SAVAGES

     Teaching Angel. Finding a campfire. Determine from the conditions
     that it was recently made. Prospecting from the tops of trees. A
     climbing ring. How made and used. The climbing operation. Harry
     sees another forest to the south. Clear in the west. The wounded
     yak calls a halt. Resuming the journey. Harry in the grasp of a
     giant anaconda. John severs its body with a bolo. Boa constrictor.
     The python. The Cashew tree. Gum arabic. Seeing the West River.
     Discovering signs of habitations to the south. Course to be
     followed in meeting the natives. Hearing voices in the night.
     Crackling of twigs. A party of savages. The next morning. Examining
     the tracks made by the midnight party. Following the trail thus
     made. The open country. The first view of the inhabitants.



LIST OF ILLUSTRATIONS


"The Professor was reading the scrap, and silently handed it to George"

"'We have probably found a pirate's lair, and here is the booty'"

"The Professor walked toward him and held out his hand"

"With a single stroke the body of the snake was severed above the last
coil"



LIST OF FIGURES


 1.  The Broken Yoke

 2.  Top View of Boat

 3.  Side View of Boat

 4.  Cross Section of Boat

 5.  Force of Momentum

 6.  Red Angel

 7.  The Color Spectrum

 8.  Reflection Angle

 9.  The Hidden Message

10.  The First Gun

11.  The Bullet

12.  The Sea-going Boat

13.  The Cave

14.  The Slab Found in the Cave

15.  Old Coins Found in Cave

16.  Cane Crusher

17.  A Magnet

18.  Magnetic Induction

19.  The Two Magnets

20.  Making a Permanent Magnet

21.  Illustrating Wind Pressure, 1

22.  Illustrating Wind Pressure, 2

23.  Mariner's Compass

24.  Chart of the Voyage

25.  The Charting Board

26.  Guava

27.  Coffee

28.  Cream Separator

29.  The Lion and Cubs

30.  The Puma

31.  The Acajou



THE MYSTERIES OF THE CAVERNS



CHAPTER I

MYSTERIOUS DISAPPEARANCE OF THE TEAM


The boys looked at the Professor in amazement. They were too much
excited and concerned at the new situation to be able to interpret what
the sudden disappearance of their team meant.

The Professor turned to the boys: "Are you sure the yaks were tied
before we left them?"

"I was particularly careful," answered Harry, "to tie both of them."

"I am pretty sure that both were securely fastened, and they were in
that condition when I came back the last time," was George's reply.

To understand the peculiar situation above referred to, it will be
necessary to go back and briefly relate some of the remarkable events
which had taken place in the lives of the three people concerned in this
history.

George Mayfield and Harry Crandall, together with a Professor, were
mates on a ship training school, which sailed from New York one year
before. A terrific explosion at sea cast them adrift in mid-Pacific
Ocean, and after five days of suffering they were cast ashore on an
apparently uncharted island, without any food, and entirely devoid of
any tools, implements or weapons.

Exercising the knowledge of the Professor, and the ingenuity of the
boys, they gradually dug from mother earth and from the rocks and trees
the articles necessary to sustain life, and eventually they found
different ores from which various implements and weapons were made. They
constructed numerous machines, crude, at first, and gradually developed
them. They succeeded in capturing yaks, a bovine species of animals,
some of which were trained like oxen; wagons were built; a shop
constructed; a water wheel installed; a primitive sawmill put up; a
primary battery made; articles of clothing woven; felt made; and
numerous things of this character originated from material which nature
had furnished in its crude state.

While doing all this the desire to explore the island was a
predominating one. Four trips into the interior had been made in order
to ascertain whether or not it contained any human beings. During those
trips numerous evidences were found to show that savages were there, and
some indications that civilized people had visited the island.

The peculiar happenings which excited their interest were the mysterious
things that occurred at various times, among which the following may be
briefly enumerated: The disappearance of a boat, which they built, and
which was left at the place where the team was lost; the subsequent
finding of the boat among debris on the seashore, having oars and rope
in it which were strange to them; the removal of the flagpole and flag
which had been erected up on a high point near the ocean, called
Observation Hill, and the fire in the forest.

To the foregoing may be added the discovery of a prospecting hole, which
had been dug, evidently, by some one in the hope of finding mineral; a
yak with a brand on it; wreckage of a boat, which, undoubtedly, belonged
to their ill-fated ship; a gruesome skeleton on the seashore; and
finally one of the lifeboats of the schoolship and a companion to their
own, found on the shore of the stream where they now were.

All these things were sufficient not only to cause alarm, but the
greatest consternation on the part of the boys. It must be said,
however, that the trials of the boys, under the calm, calculating
deportment of the Professor, had done much to make them self-reliant.
George, the elder, was of an exceedingly inquisitive turn of mind; he
was a theorist, and tried to find out the reason for everything. On the
other hand, Harry was practical in all his efforts; he could take the
knowledge obtained and profit by it, as the previous volumes show. It
was fortunate, therefore, as the Professor put it, that theory and
practice were personified in the two boys, who, although companionable,
were the exact opposites as types.

The Professor never showed a preference, in any manner, for either. Like
the true philosopher he saw the value of the two distinct qualities, the
one useless without the other.

When they had fully recovered from their astonishment, George was the
first to speak. "They may have broken the fastenings."

The Professor, who had been intently examining the tree to which they
were hitched, said: "I can find no evidence of any undue wrench which
might show that they had gotten away by their own exertions. Let us see
whether we can follow the trail."

The ground was covered with leaves, so that no earth was visible, and
the only sort of trail left in a forest, under those conditions, is the
slightly depressed tracks which the wheels make. They examined this,
noting also the overturned leaves, which are usually left in the wake of
cattle.

The latter means seemed to be the only available way in which any trace
could be made out, and this they followed. It led directly to the west,
and toward the section they were desirous of exploring at the time the
present trip was inaugurated.

"How fast do you suppose the team is traveling?"

"Certainly not faster than we are now going. They cannot be hurried very
well, as you know, and we should be able to overtake them within an hour
or two."

"But what shall we do if we find them in charge of somebody?"

That suggestion brought up at once a very serious question. They had
made six pistols, very crude, it is true, but which served admirably as
weapons of defense; but the hazardous part of the present situation was
that only the Professor had one of the pistols, the others having been
left with the team. The only thing which added some comfort was the
knowledge that as the pistols required a special hook to enable them to
cock the firing plug, and as the Professor had this hook, those who took
the team might not be able to use the weapons against them.

At this place it might be well to refer to Red Angel. Nearly nine months
before, on one of their trips, a baby orang-outan had been captured, and
the boys educated him, as best they could, and he really developed many
reasonable instincts. It was Red Angel who left the wagon and followed
them down the river, and who by his peculiar actions attracted attention
to their missing team.

"We owe something to Angel for his cuteness in coming for us," said
Harry.

The orang progressed rapidly, swinging, as he did, from tree to tree on
the route, and when no trees were in sight, would shamble along in a
peculiar way, as it is difficult for them to walk erect. Their feet are
not adapted to promote a graceful gait.

"The track seems to be lost," said the Professor. "I cannot make it out,
either from the leaves or the depression. However, it appears best to
follow this course."

Without stopping they proceeded in the same general direction. Red
Angel, who up to this time had followed the route taken by the party,
now turned to the right, and when George called, refused to return. As
George walked toward him, he kept advancing to the right, and could not
be induced to come back.

"Probably we should follow him," was the Professor's conclusion.

It was evident from Angel's antics that the change in the course
delighted him.

George, who was ahead, soon stopped, and shouted back, gleefully. "Here
are the tracks! Good fellow, come here!"

Angel understood this. He had actually sensed the direction taken by the
missing team, for here were the tracks. The only thing that grieved
George was the absence of the honey pot. Angel's weakness was honey, and
that was now with the team.

Suddenly Angel, who was now in one of the large trees which grew all
along the course, began an excitable chatter, and vigorously jumped from
one limb to the next, and George, who knew his antics pretty well by
this time, stopped and prepared himself for some new and unexpected
development in this remarkable journey. Angel, on the other hand,
started off through the trees with wonderful agility, and it was all the
boys could do to follow.

There, ahead of them, was the wagon perched against a tree, one of the
front wheels and an axle broken, and the tongue wrenched off; but the
yaks had disappeared. It is singular that the team had gone thus far
without meeting an obstruction. As it was, one wheel had locked with a
tree, and the yaks, by their tremendous power, had broken the parts
mentioned and gone on.

Before the wagon was reached, however, numbers of articles were found
scattered along the trail, which were gathered up.

The finding of the wagon was an intense relief. Their minds had been
perturbed with this occurrence, as never before, and they had met
numerous thrilling episodes before.

"Something must have frightened the yaks, and they were going at a much
greater speed than at a walk when they collided with the tree," observed
the Professor.

"Why do you think so?" asked Harry.

"In the first place, the fact that our articles were scattered along the
path before they reached the tree; and, secondly, the wagon pole and the
wheel were strong enough to hold the yaks against the tree if they had
been moving along at their usual gait."

"Well, I am thankful that we have the wagon, even though the yaks are
gone," said George, as he crawled into it. He peered out and continued
in a surprised tone: "Where do you suppose the pistols are? Did you
leave yours in the box, Harry?"

"Yes; on the right side. Yours were there at the time. I saw all of
them."

"They are not here now, and it is likely they have been lost with some
of the other things." Harry was up in an instant.

"Where is the ammunition?"

"It was all in the bottom of the box."

It did not seem at all likely that the pistols or the ammunition could
fall out of the box. It is true other things had fallen along the way,
but this seemed to be such an unlikely occurrence that they could
scarcely credit it.

The provisions were safe, and you may be sure that Angel was not only
petted, but he received a good share of the delicious sweet.

It was now nearing night, and they were fully ten miles from home. Ten
miles is not a long tramp, but to travelers like ours, already weary
with their trudging and with the excitements of the day, it was
concluded to camp in the wagon for the night, and then proceed home
early in the morning. To take the wagon would be an impossibility.

They really learned to love the patient yaks. For fully five months they
had been daily companions, and were now so well trained that some
discouragement was felt at being compelled again to break in others.
They had an ample supply of good material in the herd to pick from, but
it took time and patience to develop such a team as had been lost.

During the entire night one of the trio kept watch, not so much from a
feeling of fear as in the hope the yaks would return during the night;
but they were doomed to disappointment. Morning came, but the yaks did
not, and after gathering together the most useful belongings, and
putting them into convenient bundles for carrying purposes, set out for
home.

The first question taken up by the boys after their return was the
selection of a pair of young steers for the new team; and the work of
making a new pair of yokes was carried forward with energy. They were in
the midst of the planting season which had been interrupted when the
last journey was undertaken.

Hitherto it had been the custom to devote at least one day each week to
hunting, on which occasions they also made trips to such points in the
island as had not been previously visited; and it was also a part of
their duty to examine the woods and the fields to find new specimens of
plants, fruits and flowers; and among the hills and ravines were many
kinds of ore, some of which they had been fortunate enough to find on
their entry to the island.

The metals thus found were utilized, because they had set up a workshop
alongside the sawmill, and in it had a crude lathe adapted to work in
wood or iron. It will thus be seen that each tour was for prospecting
purposes, to supply their needs, as well as to learn what the island
contained.

Each evening it was the habit to have a general discussion concerning
the events of the day, or with reference to matters of moment about the
work to be done on the morrow.

George was much interested in the planting program. "What kinds of
vegetable would it be most advisable to plant in the space we have
prepared?"

"One of the important points to consider in the planting of all crops is
whether the soil is adapted for it. When the United States were first
settled it was a surprising thing that many of the original settlers
would go miles inland, exposed to every sort of danger, to find land,
when there was plenty nearer the seashore or close to civilization.
There was a reason for that which we are only now beginning fully to
understand. Plants have a habit of growing in soil adapted for their
needs, and it would be an interesting study in going over our island to
consider the habits of plants in this respect."

"Is that the reason why different countries have such different kinds of
plants?"

"Yes; plants select their soil, and owing to these habits, every variety
of soil, in every climate, supports its own vegetable tribes. Of the
five thousand flowering plants of central Europe, only three hundred
grow on peaty soils, and those are mainly rushes and sedges. In the
native forests of northern Europe and America, the unlettered explorer
hails with joy the broad-leaved trees glittering in the sun among the
pines, as a symptom of good land, which he knows how to cultivate. The
rudest peasant in Europe knows that wheat and beans seek clay soils; the
northern German knows that rye alone and the potato are best adapted for
the blowing sands of that country; the Chinese peasant, that the warm
sloping banks of light land are fitted for the tea plant, and stiff,
wet, impervious flooded clays for his rice. Even the slaves in the
Southern States were aware that open alluvial lands were best suited to
cotton; and the degraded slaves of Pernambuco know that the cocoa grows
only on the sandy soils of the coast, just the same as in west Africa
the oil palms flourish on the moist sea sand that skirts the shore, and
the mangroves where muddy shallows are daily deserted by the retiring
tide."

"Some time ago you stated in one of our talks that soil was the
necessary thing to select in order to propagate, or make good fruit and
grain out of the poor or wild kind. Were all our vegetables and grains
originally wild?"

"Originally nothing in the way of fruit, flower, grain or garden
vegetables was anything but wild and unproductive, or bitter, tasteless
or unprofitable. Chemical changes are made in the plant by the soil in
which it grows, because it is from the soil that it gets its food. The
large and juicy carrot found at home is nothing but the woody spindle of
the wild carrot, and I have found several species of it here. Cabbages,
cauliflowers, Brussels sprouts and a host of other like vegetables were,
in their natural state, poor, woody, bitter stems, and had useless
roots. As I have already stated, the wild potato, which we are now
cultivating, has, in its original state, a bitter root, as you have
discovered."



CHAPTER II

WORKING ON THE NEW BOAT


Early the following morning Harry sprang out of bed and hurriedly
shouted: "What did we do with the lifeboat in South River? Do you
remember whether we secured it when Angel came up and let us know about
the team?"

The Professor and George were up in an instant. George was the first to
answer. "I left it the moment Angel came up."

"I cannot remember," said the Professor, slowly, "but it seems to me,
now that I think of it, we left it on the banks, and it wouldn't do to
leave it there. You must go for it at once, and bring it down to the
bay, even though you cannot bring it around the cliffs."

A hurried breakfast was prepared and the boys started off at an eager
pace for the river. They went directly southwest, aiming to strike the
river near the falls, and after passing over familiar ground, came
within several miles of it, when, in going down one of the sloping
descents, saw, in the distance, what appeared to be portion of the yoke
which the yaks carried.

They hurried forward, and great was the delight at finding it was really
one of those they had made and used for months. It was a gratification
to know that the animals were east of the falls, and, probably, sooner
or later, would turn up at their home. Only one of the yokes was found,
but there was evidence that both of the yaks were freed, since the part
of the other yoke was still attached to the part found.

The boys were glad of this, as they had such a friendly feeling for the
animals that they could not but feel that to be yoked together in the
forest would be a cruelty to them.

"The Professor will be glad to know this," said George. "Look at this
part of the yoke, where it has been broken. I have no doubt that this is
where they struck the tree where the wagon caught."

[Illustration: _Fig. 1. THE BROKEN YOKE_]

"Let us take it with us, by all means," said Harry. An examination of
the yoke plainly showed where it had come in contact with bark with
considerable force. "What do you suppose caused them to be so frightened
as to run away?"

They quickened their steps, and soon reached the river. There, on the
shore, was the lifeboat, as they had left it, and it was the work of
minutes only to set it adrift, and after depositing the yoke in the
bottom, the first task was to supply themselves with a pair of oars.

The first article turned out in the way of tools was a bolo, a heavy
cleaver-like blade, used by many primitive tribes. This article was
duplicated by them, and always carried on all their expeditions. With
this several small trees were cut down, and a pair of oars fashioned for
each, and within an hour they were on their way down the stream, and in
two hours more had rounded the point of projecting land east of the
river mouth.

"Don't let us take any more chances of losing this boat. I am in favor
of taking it around, and am willing to risk the tide, whatever it may
be."

Harry's suggestion met with favor on the part of George, and when the
point was rounded and they were out in the ocean, the tide, although
coming in, had no terrors for them, but they boldly plied the oars, and
before four o'clock had rounded the cliff point, and steered the craft
into the mouth of Cataract River.

The Cataract was a much smaller stream than South River, and it was on
the northern side of the island; whereas South River was on the
southerly side of the island. Less than a quarter of a mile from the
open sea was a cataract, at which their home was located, and the
cataract was utilized as the means for producing water power.

Their appearance below the Cataract was hailed with delight by the
Professor, and you may be sure that when the boat was finally landed and
hauled up on the beach, all of them joined in the congratulations, which
was their due.

"Just to think of it. If we had the boat we made, our lifeboat and all
the parts of the wreck of the other boat, we would have a pretty
respectable navy," was Harry's observation, when they landed. As it was,
they now had the wrecked after part of their own lifeboat, and here was
the other lying alongside. They knew the history of one of them. Would
they soon know why the other should have been found in the interior of
the island under such peculiar circumstances?

"And where did you get the yoke?" asked the Professor, as his eye caught
sight of it.

"Two miles this side of the falls."

They little knew at this time what an important bearing the finding of
this boat would have on their future course, nor could they know how
this little incident would be of the greatest value to some of their
companions on the ill-fated ship.

They now had possession of a boat which, while it was practically
unsinkable, was not of such size as to meet their demands for the
intended explorations. They felt that to attempt to circumnavigate the
island and take all the chances which a meeting with natives might
involve, would necessitate a much larger vessel. To add to the
difficulty, all the pistols but one had been lost in the last trip, and
to attempt to make explorations without proper weapons would be
foolhardy. If they knew one thing, with any degree of certainty, it was
that the island contained savages of some description, and provision
must be made for every contingency.

Harry took upon himself the task of turning out more of the weapons, and
with the experience of the past four months in this line of work,
concluded he would attempt a better job than simply making pistols. It
was his ambition to make a firearm that would enable them to bag the
largest game, and also, at the same time, carry the bullets a greater
distance than the short eight-inch barrels could.

To do this it was necessary to provide longer bits, and as the design of
the new guns contemplated a barrel at least eighteen inches long, the
bits had to be longer, in proportion, and the making of these consumed
nearly as much time as the actual drilling out of the barrels.

George and the Professor put in a great deal of time with the new team.
Their knowledge of training, in view of the former experience with these
animals, was such that within a week they could drive the yaks without
much difficulty, although the new team was not by any manner of means as
efficient as the lost one.

When the question of the kind of material for the guns came up, Harry
was much concerned, as in making the barrels that length would
necessarily greatly increase the weight.

"I think it would be better to make an alloy for your purposes," said
the Professor, as they were discussing the matter.

"What is an alloy?"

"It is the combination of two or more metals."

"In what way does the alloy make it better than the hardest steel?"

"It is not hardness you want, but toughness. Metals have several
properties, which are utilized for various purposes in the arts.
Surprising as it may seem, wood has greater resisting power than
diamond, and yet the precious stone is the hardest of all substances."

"But if we unite two metals are we not then making a new metal?"

"Not necessarily so. In the case of brass it is true. This is made by
uniting two parts of copper and one of zinc. Both copper and zinc in
themselves are very soft, and copper cannot well be polished in its pure
state. Brass, however, is not only much harder, but is susceptible of a
very fine polish."

"Are the alloys of all metals harder than the metals of which they are
made?"

"This seems to be a universal law in the compounding of metals. Very few
metals are used alone in the various arts and manufactures. For every
purpose some combination has been found which makes the product better.
Even coins are so alloyed. Silver and gold in the form of money would be
entirely too soft, unless alloyed with some hardening metal. Some
substances, like arsenic, antimony and bismuth, are too brittle to be
used alone. The only metals which can be used alone are aluminum, zinc,
iron, tin, copper, lead, mercury, silver, gold and platinum."

"What is bronze, of which all the ancient guns were made?"

"That is a combination of copper and tin. This product was known fully
seven hundred years before the Christian era, and was used in the making
of guns until superseded by the various steel alloys of our day."

"In what proportions are copper and tin united to make bronze?"

"The proportions vary greatly. Ancient Celtic bronze had 12 parts tin
and 88 of copper; Egyptian, 22 tin, 78 copper; Chinese, 20 tin, 80
copper; Roman, 15 tin, 85 copper; and in many specimens lead and zinc
were also used. Tin has a capacity to harden almost any metal."

"What is the best metal to harden steel?"

"Manganese, of which you will remember we have some samples; it is the
most serviceable, as we have neither nickel nor chromium."

"What amount of that metal should we use to get the best results?"

"About 14 per cent. of manganese has been found the best for such
purposes as would be required in gun barrels. There is a curious thing
which has been discovered in uniting manganese with steel. It becomes
fairly tough if 1 per cent. is used with the steel; if the quantity
added is between 1-1/4 and 3-1/2 the strength and ductility decrease;
but above that, up to 5 per cent., the steel becomes brittle; above
6-1/2 per cent. it again returns to ductility and toughness and its
maximum strength is found at 14 per cent."

During the evenings all took a hand at cutting out the stocks for the
guns, and the plans upon which they were constructed will be fully
explained and illustrated in the order of the work done.

Meanwhile it must not be supposed that work on the new boat had ceased.
Harry's plan, when fully worked out, provided for one twenty feet long
and six and a half feet wide amidships.

The drawing (Fig. 2) shows the construction of the hull. As they had no
means for doing any fancy bending of the boards, the bottom was made
flat, and the sides sloping. The bottom and the sides were made in the
following manner: Two stringers (A, A) were first constructed, which
were made up of thin pieces nailed together, so they could be bent in
the proper shape for the bottom boards, which were laid crosswise and
nailed to these stringers.

[Illustration: _Fig 2. TOP VIEW OF BOAT_]

[Illustration: _Fig 3. SIDE VIEW_]

For the upper edges of the sides, called the gunwale (B, B), similar
stringers were provided, but they extended farther fore and aft, and
amidships were fully six and a half feet apart, whereas the lower
stringers amidships were four and a half feet apart. This arrangement,
therefore, provided for sloping sides, and the side pieces ran up and
down on the inner course. It will be understood that the sides and
bottom thus formed were to be overlaid with thin boards running fore and
aft, as in Fig. 2, as they had no means for matching the boards and thus
putting them together tightly.

The sides were two and a half feet high. Six and a half feet from the
forward end was a cross beam (C), into which the mast was to be stepped.
At the stern the bottom was sloping upwardly at an angle and brackets
(D) were extended back and joined at their rear ends, to which the lower
end of the rudder post was attached.

Amidships a keel (E) was formed, projecting down from the bottom, this
keel being, at its widest part, two feet, and tapering down to merge
with the bottom, fore and aft. The cross section (Fig. 4) shows how well
he had formed the vessel, proportionally.

[Illustration: _Fig. 4. Cross Section._]

In addition to the cross seats, similar arrangements for comfort were
made along the sides, and beneath the side seats were spaces in which
their supplies were to be placed. The space forward of the mast was
entirely closed over with a roof which sloped in both directions, and
here provision was made for two berths. This would also afford them
protection and serve as a means to keep out the water and insure at
least one dry spot for their comfort.

As usual, George had some inquiries to make about the boat. "It has
always been a matter of wonder why all boats are made with the big
bulging part nearest the forward end?"

The Professor's eyes twinkled. "Probably there are a great many others
who have had such thoughts. There is really no reason for it. It is not
known how the custom originated, except that in sailing vessels the
claim is that the ship can be maneuvered more easily by such
construction."

"In what way does it make it easier to handle?"

"When a ship is driven forward by the wind, all the force exerted on the
sails is transferred to the forward part of the ship, hence if made
narrow at its forward end it would be driven down into the water, and
the hull would, therefore, be submerged more at the forward than at the
rear end. Furthermore, by having a tapering rear end, the rudder has a
better opportunity of veering the ship around and you can see that the
bulging part, being located forward of the middle portion of the ship,
acts as a sort of pivot."

"But it seems to me that none of the reasons given will apply to a
steamship, and still all the ships I have seen are made in the same way
as the sailing vessels."

"That is exactly what I inferred in my answer to your first question.
The truth is, that in experiments which have been made, it is shown that
to have the widest part of a steamer near the stern, gives lines to a
hull which has less resistance than if made in the conventional way."

"I thought probably the reason for making them so was just the same as
in the case of an arrow, where the heaviest part is at the forward end."

"In that case an entirely different principle is involved. A body falls,
or is projected through the air, with its heaviest end foremost, because
of the greater momentum in that portion."

"It is the force of a body in motion. When a body is projected through
the air it meets with the resistance of the atmosphere, and this also
serves to turn the heavy side around to the forward end, because the
force of momentum in the heavy end is much less affected by the
resistance of the air than the lighter end." (See Fig. 5.)

[Illustration: _Fig. 5._]

Red Angel had now been with them more than six months, and he was
probably a year old. When first captured he was a scrawny infant, dull
and stupid, like all of his class. He had wonderful powers in the way of
imitating habits and customs. The boys were very good vocalists, and
while at work Harry would sing, but George whistled. It was an amusing
sight to watch Red Angel when the boys engaged in the frequent concerts
at night.

[Illustration: _Fig. 6. Red Angel._]

But of all the screamingly funny exhibitions, the attempt of Angel to
imitate whistling was the most ludicrous. The orang's lips project too
much to a point, and the jaws are so narrowed that the lips will not
pucker. Whenever the boys commenced their concert Angel would be on
hand, and enjoyed every moment of the time, and the boys had many a
concert purely for his benefit.

At the end of each concert the whistling would begin. This invariably
brought Angel to the front, and his exhibitions would be given with the
utmost gravity and earnestness. The invariable result would be such
uproarious fits of laughter on the part of all that he would take part
in the jollification, little suspecting that the laughter was at his
expense.

The only sound which he could emit during these performances sounded
like a high-pitched stick rattling along a pale fence; but he was
inordinately proud of it. It had always been on one key, heretofore, and
without variation; but this evening Angel startled himself, as he did
the others, by actually sounding two additional notes. He repeated this
over and over.

"I wonder if we could make him talk?" asked George, after the laughter
had subsided.

"There is no reason why some tones cannot be imitated. As the orang
possesses wonderful powers of imitation and has, in captivity, developed
many traits, I see no reason why simple words, or sounds, cannot be
taught."

"I know there are words which he does understand. Time and again I have
told him things, which he seems to understand. Now see if he understands
this: 'Angel, do you want some honey?'"

His attempts at whistling ceased, and in a moment more was in the
kitchen. Harry, who by this time had recovered from his mirth, thought
it would be a good idea to attempt to teach him.

"If canary birds and dogs can understand language, I do not see why
Angel shouldn't."

"Unquestionably, any animal, by patience, will learn the meaning of
sounds. Constant repetition of certain notes causes birds to repeat
them. I have known dogs to perform almost anything they were told to do,
although they are not able to utter a single sound of the words emitted
in giving the command."

"Well, what is it that causes sound?"

"The most wonderful thing in nature is, that she manifests herself in
only one way, namely, by a movement, or a motion of some kind. Vibration
is the term used to designate this. Sound, light, heat, taste, smell,
and everything which becomes sensible to us is produced by vibration.
The movements of the heavenly bodies, swinging back and forth around the
sun, like huge pendulums, the movement of the sap in trees, up and down,
the beating of the heart, the winking eyelids are all motions which show
energy, development, life."

"But what is it that makes us understand one sound from the others?"

"Simply the difference in the kind of vibration. There are three things
which characterize sounds; namely, pitch, intensity and character. Pitch
depends on the rapidity of the vibrations; intensity on the extent or
the amplitude of the vibrations; and character on the substance or
instrument producing them. To illustrate: When you sing a very high note
the vibrations may be five thousand vibrations a second, or there may be
only two thousand during that time. That represents the pitch. In
singing that note you may sing it so loud that, like a pendulum, it will
swing way over to one side, or it may move only a short distance. That
represents intensity. If either you or George had sung that note I
should have been able to detect it, whatever its pitch or intensity,
because your voices are as unlike as different musical instruments, and
that is character, or timbre, as the French call it."



CHAPTER III

THE HIDDEN MESSAGE


While the work of getting out the planking for the boat was going on,
and the plowing had now been resumed, since the new yoke of oxen were
fitted to do the work, the boys were not forgetful of the usual weekly
outing. They had several quite important things right at home which
needed looking into, if they wanted to solve some of the things on the
island. First, the cave, which they had twice attempted to explore; the
search for their lost boat, which had the strange rope and oars; and the
mystery of the flag and pole.

These things weighed heavily on their minds, because these happenings
were close at hand. But what made the greatest impression on the minds
of all was the finding of the _Investigator's_ lifeboat. It seemed
almost like a call to them from the interior. The impatience of the boys
was almost beyond restraint, at times.

"It does seem to me that we should not delay an hour in making some
effort to explore the direction the boat came from," was George's view
of the situation as they canvassed the subject.

"That is my idea, also, and I am not in favor of giving much more time
to hunting or other forms of recreation until we know how that boat came
to South River."

"Yes; I can appreciate how anxious you are," said the Professor, after
the boys had given their views. "What we are doing, however, is
essential from every point of view. We must prepare provisions, so that
we shall be able to know where we can get them in case of need. On the
other hand, weapons are necessary, which take time to construct. If,
however, it is thought advisable, we might make a trip of explorations
along the South River, beyond the falls, the time to be limited to a
week; but I have my doubts of the wisdom of such a course."

This suggestion appealed strongly to the boys, who were always keen for
anything which savored of adventure, and it was some time before the
boys could reconcile themselves to the saner and more business-like
course of completing the boat and making the trip by water.

The weather was beautiful, and vegetation was springing up in abundant
profusion everywhere. Magnificent showers fell at intervals, and the
rainbows, more beautiful than any they had ever heretofore seen, spanned
the heavens after the showers.

This had been noticed during the previous year, but now, after nine
months of their life, with the wonderful insight which their needs had
instilled into them, made them very observant of every phenomenon.

"I have often wondered," observed George, as he gazed at the beautiful
broad band which formed a crescent across the heavens, "why there are
never any rainbows in the middle of the day. They are never seen except
in the morning or in the evening, and usually only in the evening."

"In order to understand that it will be necessary to explain what a
rainbow is. As I stated previously, light is merely vibration. Now
colors are formed by the different lengths of the vibrations, just the
same as the different musical notes are made by the different vibratory
lengths. To understand this more fully, I make a sketch (Fig. 7), which
shows just what I mean. You will see that red is the lowest musical
pitch, which we will call C, and to the right is a long, wavy line. D,
the next pitch higher, might resemble orange, with the wavy line a
little shorter, and so on, until we reach the highest note in the scale,
where the wave lengths are very short. You have probably noticed that a
drop of water in the sunshine glistens, and, if closely observed, may
have seen that it was colored, particularly blue or green. As the rays
of the sun strike the globe of water, they produce different wave
lengths, and in that way make it appear to you as being possessed of
colors. Now, a rainbow is nothing more nor less than sunlight passing
through the drops of water which are suspended in the air and causing a
refraction of the light. At noon the sun shines down from overhead, and
we are not in the proper position to see this refracted light; but in
the morning or in the evening the sun shines against the earth at an
angle. At those times we are able to see the effect of refraction by the
colors produced.

[Illustration: _Fig. 7. THE COLOR SPECTRUM_]

[Illustration: _Fig. 8. REFLECTION ANGLE_]

"When you throw a ball against a wall at an angle, it bounds away at the
same angle. That is reflection, and is just exactly what light does when
a ray strikes a mirror. If, on the other hand, the glass had no mercury
on it to reflect the light, the ray would not go straight through, but
would bend, just as you have seen a stick in a glass of water appearing
as though it was bent below the water line. That is refraction."

Two weeks of very vigorous work had now been put in since the yaks had
disappeared, and the wagon was still at the edge of the forest. George
was anxious to recover it, with the new team, and with Harry started out
early in the morning to make up as much as possible lost time, as every
hour was considered valuable in their enterprises.

The yaks could be ridden as well as horses, but the greater part of the
way were driven. One of the guns which had been completed was taken
along, as well as the only pistol which the Professor had saved. In less
than three hours the forest was reached and they were soon within sight
of the wagon.

"What have we there?" cried Harry, as they neared the spot.

"Our yaks! And where do you suppose they have been?"

Close by the wagon were the yaks, as though patiently waiting for the
boys. They made no resistance, nor show of fright, when the boys
approached. One of them, Jack, still had the strap tied to the horns,
and it was the halter which had been attached to the tree at South
River.

A hasty examination was made, but if either of the boys came to any
conclusion concerning it, nothing was said. Without wasting time, the
team brought with them was yoked up and the broken wheel replaced by a
new one. The repairs to the wagon tongue did not take long, and they
were ready for the return.

"What shall we do with Jack and Jill?" Those were the names bestowed on
the first team. "Let us see if they will follow us."

They had gone fully one hundred feet before the yaks made any sign, and
then slowly followed, thus assuring them that no care or attention would
be required in that direction. Both boys were intensely delighted at the
recovery of their favorites and could not get home fast enough to give
the Professor the good news.

Nearing home, the Professor, who was on the watch, came out to meet
them, waving his hat at the sight of Jack and Jill. When the latter came
up he went over and affectionately petted the creatures, who seemed to
realize the welcome.

"I hope they are as glad as we are; I can understand why they got away;
look at the end of this thong." It plainly showed the teeth of some
animal which had gnawed the leather of which it was made.

"So you have been out prospecting, too?" was Harry's query, as he saw
the queer-looking reeds on the table in the laboratory that evening.
"What do you call that?"

"Our honey has been getting low, and I took the occasion to-day to bring
in some samples of sugar."

"Is that sugar cane?"

"Yes; the true sugar cane."

"Is that different from sorghum?"

"This is the species which grows in the southern part of the United
States. The kind you know and which is cultivated in the Northern
States, is the Chinese Sorgo, or, as we call it, sorghum. It is equal in
quality and in quantity to the southern species and is readily treated
to produce molasses or sugar."

"What is that peculiar flower, if it is a flower? I never saw a flower
like that; it seems to be hard."

"I was surprised to find this. It is called the Tamarisk. This long,
oval-shaped part is made by an insect which inhabits the plant, and is
eaten by the inhabitants in the plains east of the Mediterranean Sea. It
is there called Mount Sinai Manna, and is supposed to be the Manna which
the Jews found when they were in the Wilderness after the Exodus."

"I think we have properly named this place Wonder Island."

In the volume preceding this, when they first considered the building of
a new boat, it was decided to graft an extension to the after part of
their wrecked lifeboat; but when the second one was found, and
calculations were made as to its usefulness, it was discovered that such
a course would not be wise; hence the larger vessel was found to be the
only solution.

The newly discovered boat was, however, a valuable addition, as it
afforded a means by which short trips could be made, and Harry quietly
set to work making a sail and rigging up a mast, so that the
long-cherished desire to make these trips could be undertaken before
they were ready to launch the real vessel. It was hauled up on shore and
caulked and new parts added to make it adaptable for the purpose.

While engaged at this work he removed the cross seat which still
remained, and in doing so was surprised to find a piece of cardboard
which had been hidden, apparently, at the end of the board. Eagerly
picking it up, he saw writing on it, with the following words: "We
cannot hold out much longer. Wright and Walters were captured yesterday.
WILL."

[Illustration: _Fig. 9. THE HIDDEN MESSAGE_]

Harry could hardly contain himself, as he rushed up to the laboratory,
crying out: "George, come here, quickly! I have found something!"
Without waiting to see whether George heard, he rushed into the
Professor's den with the paper in his outstretched hand. "Look at this;
don't you remember Will Sayers? I am sure it is Will."

George heard his excited voice, and appeared without any delay.

"What is it now?"

The Professor was reading the scrap, and silently handed it to George.
"Did you know either of the boys mentioned in this?"

Neither had any recollection of Wright or Walters, but they inferred
that the writer must be Will Sayers, one of the companions. The
Professor had no recollection of the boy, nor could he remember the
other names.

"Let us examine every part of the boat," was the Professor's first
suggestion. "We may find something more to give some clue."

The boys rushed down to the beach where the boat was moored, the
Professor following.

"Show us the exact location of this strip."

"I had just taken off this cross seat, and as I did so this piece fell
from the end."

"Let us put it back again and see how it fits into that place."

When it was replaced they noticed that a crack was left at each end of
the seat, not exceeding an eighth of an inch.

"It is very plain that the piece you found was at this end, and if it
was folded as this crease indicates, it could have been concealed there
and thus escaped our observation." After some minutes' examination, he
continued: "This piece must have been there for some time."

"Why do you think so?"

"You will notice that the end of the board has the marks of the folded
paper, showing it must have been in its place of concealment for some
time. Furthermore, the paper itself indicates that it has been there for
some time, by the discoloration on its outer side."

"How long do you think it may have been there?"

"It is impossible to say; but certainly for several months."

"Doesn't it seem reasonable," Harry inquired, "to think it was some one
from the _Investigator_? Otherwise, how is it that they had possession
of the boat?"

"That is the problem we shall now have to find out."

Thus, in another direction, was found an evidence that savages were on
the island and that others had been wrecked and found a refuge there.
How much of a refuge it was to them they had no means of knowing. They
were thankful their own lives had been preserved and had been permitted
to accomplish so much during their enforced stay.

"We are now vigorous and strong and have been blessed with energy as
well as health. It is our first duty to take up the task of finding our
comrades, whatever the cost may be. If that is your view, we should
proceed with that determination, but let us prepare for it in the best
manner possible. How long will it take to finish the six guns you are
now at?" said the Professor, looking at Harry.

"I will try to have them ready within another week," was his reply.

"In the meantime, George and I will prepare a new lot of powder; and for
your further information, I will state that I have been busy during the
past week in making preparations to extract some lead for bullets."

This announcement was hailed with joy. Heretofore they had to depend on
the iron slugs which had been turned out, and they were not at all
satisfactory, because they lacked the proper weight.

"Which is the lead?" asked George, who was examining the samples.

"It is this bluish-gray sample of galena, which, as you see, looks like
lead itself, and is often mistaken for it; but it is far from being lead
of the kind we can work."

"Why not?"

"Because it is in what is called a sulphide form. Do you remember what a
sulphide is?"

"Yes; it is where it is in combination with something."

"That is a fairly good definition. More or less sulphur is found in all
metals, but when found in large quantities the ore is called a
sulphide."

"How can we get rid of the sulphur?"

"We can cook it and drive it off like steam. Lead melts at a low
temperature, comparatively, about 600 degrees Fahrenheit, so that with
our furnaces it will be a very easy matter to get a pure lead."

During the rest of the day all were in the laboratory, superintending
the preparation for the work, and at the Professor's suggestion the boys
took the team in the morning and brought in over a hundred pounds of
galena to be treated.

Before noon they had forty pounds of a very fine quality lead, and the
work of making molds for the bullets was begun. The Professor, however,
suggested that the boys should devote their time to the construction of
the boat and guns, and it was difficult to decide what was the proper
thing to do first.

The Professor saw the dilemma and had a very earnest conference on the
subject.

"You must not, by any means, be carried away with undue eagerness and a
desire for haste. The first essential of good business is to do
everything in order. It is better to plan carefully every step in
advance, so that you will know just when your energies will be required
for the next step. An eminent engineer, on one occasion, in answer to a
question as to why he was always prepared for an emergency, laid down
this rule: Whenever you have a problem to solve, work it out in more
ways than one. If one fails, you can apply the other immediately.
This can be done without a moment's delay. Therein lies the
answer--preparedness."

The boys readily saw the force of the lesson. From that time on it was
not necessary to direct the order of events. Each saw to it that the
part allotted to him was carried out in a determined spirit.



CHAPTER IV

THE TERRIBLE MONSOONS


Of the two most urgent articles, namely, weapons or the boat, it was
decided that the guns should be completed first. The feeling that the
time would come when a visit from the savages might be expected at their
home, contributed to this decision.

Six barrels, each eighteen inches long, and with a bore three-eighths of
an inch in diameter, had been turned out, and several of the stocks had
been made at odd times during the evenings. As Harry had sufficient
steel left for four barrels more, two days were devoted to boring them
out, in the hope that they would ultimately be able to finish them up.
They would then have a battery of ten guns, and the necessity of having
a number arose from the fact that they were muzzle-loaders, and could
not be reloaded rapidly.

A sketch of the gun with the firing mechanism is furnished, in which it
will be seen that the firing plug travels in a bore formed through the
stock; in a line with the barrel. This plug had an upwardly extending
finger, so it could be drawn back against the resistance of the spring.
Below the plug was a trigger, with a hook-shaped forward end, in such a
position that when the plug was drawn back the hook would catch and hold
the plug until the lower right-angled projection of the trigger was
pulled back. This would release the plug, and the spring would then be
driven forward and explode the cap.

[Illustration: _Fig. 10. THE FIRST GUN_]

"It would be well," said the Professor, "to polish the inside of the
bored barrels, and thus make a much better weapon."

"How can we do this?" asked Harry.

"There are several ways, but the better plan would be to take a good
polishing material, in the form of a fine sand or grit, and mix it with
oil. This can then be put on a wiper which will snugly fit the bore, and
the barrel may then be put in the lathe and rotated at a high rate of
speed with the wiper in the bore, and during the rotation the wiper is
drawn in and out. This operation should be continued for an hour at
least, frequently withdrawing it to add more of the polishing grit."

"What is the best grit to use?"

"If we can find a sample of the adamantine spar, in sufficient
quantities, it would be the best substance."

"What kind of material is that?"

"It is a substance known as corundum."

"Is that the same as emery?"

"What is known as emery is the more or less impure product from the same
source. I think I have stated heretofore that both of these products
come from the precious gems; the blue variety is known under the name of
sapphire; the red as ruby; the yellow as oriental topaz, and the violet
as oriental amethyst."

During that and the following day the Professor spent some time in
prospecting for the gems, but if he succeeded in finding any samples he
did not make the discovery known.

A few days after this Harry announced that he was ready to lay the keel
of the new boat. All the material had been prepared, and was at the
beach. Prior to this the island had been visited by a heavy storm. They
had been frequent within the past month, but this was not considered
unusual.

The Professor insisted that a temporary shed should be erected to cover
the material, as moisture would make it very undesirable for the vessel,
and a day was occupied in putting up the structure.

An entire week thus passed, every hour of which was devoted with the
utmost diligence to the various enterprises. The keel was laid and the
work of putting on the bottom boards was progressing rapidly. One night,
a few days after the laying of the keel, a brisk wind sprang up, which
continued during the night, increasing in fury, and in the morning
evidences were seen on all sides of the effect of the tempest.

"It seems very singular," was George's observation, "that we should have
such terrible winds here."

The Professor had evidently expected the storms. "Do you remember the
experience we had less than a year ago? We had five days of this on the
ocean."

"I had forgotten that. Do they occur every year?"

"You may have heard of the monsoons, a periodical wind in the Indian
Ocean, which is a northeast wind, and they blow with greater or less
force from November to March."

"What causes them to blow with such regularity during those periods?"

"Ah! that is one of the things which it has been difficult to determine.
They appear to be modifications of the trade winds. While, as stated,
the northeast winds blow during the periods mentioned, they have the
southwest monsoons, which blow from April to October. As these violent
winds are the most tempestuous during the period when the sun crosses
the equator, it has been argued that it is due to the action of the sun
being in such a position that its rays strike the earth in the center of
its rotation, thus heating up the air and causing it to rise rapidly
along the middle belt."

"Is that what we understand by the equinoctial storms?"

"The equinoctial storms come in March and September, when the days and
nights are of equal length."

"I was told by a teacher that the summers are longer north of the
equator than south of it; is that true?"

"Yes; the summer north of the equator is about seven and a half days
longer."

"What is the cause of that?"

"The earth is at its greatest distance from the sun during the summer
months, and the angular motion of the earth in its orbit is slower. The
result is, that the interval from the March to the September equinoxes
is greater than from September to March."

Harry made his way through the violent wind and rain to the boat shed.
He came back with a sorry-looking countenance. "I am afraid everything
is soaked beyond recovery." He was almost on the verge of tears.

Before noon the rain abated somewhat, but the winds still blew strongly,
and when they ventured out to take stock of their surroundings, George
was the first to notice the disappearance of the flag on Observation
Hill. Rushing in to the Professor, he cried: "Our flag is gone."

Harry was at the boathouse, and when George went down to inform him of
the new calamity, he was almost heart-broken. The Professor, however,
was not in the least perturbed. He laughingly chided them and soon
restored the boys to their usual gay and happy demeanor.

"Such little incidents as we have met with this morning only give us
variety. We need something of this kind to add zest to life. Just
imagine what life would be if everything turned out just as you wanted
it or willed it? You would commit suicide within a week."

The boys smiled, but at the same time their eyelids did double duty in
the blinking line for a little while.

George straightened himself out and looked up the hill. "Well, I am
going for that flag whether it blows or not," and he started for the
hill. Angel, who was in the loft, swung down and made his way out of the
door, and before George had gone fifty feet, was at his heels. "And you
are going, too? Good boy!" and George actually hugged Angel. He
understood.

Arriving at the hill he made an examination, and found that the
halliards had been broken and the wind carried away the flag, halliards
and all. As the wind came from the sea, the flag must be inland
somewhere. Search was made in every direction, but to no purpose. Every
rock and lodging place was examined, but it had disappeared. Angel was
an interested searcher. He really seemed to divine George's mission. At
every bush, or rock, or other possible landing place, he would be the
first, and peer around, and look up and down, just as he had seen George
do.

The quest kept up for over an hour, and, sadly disappointed, he returned
with the news of his failure. The Professor took the loss lightly. "I
presume it is intended that we should work out our own rescue. After
all, I think that is the proper thing to do. If we depend on others we
are sure to meet with disappointment and failure. Cheer up, boys; flag
or no flag, let us do our duty."

"I don't mind the loss of the flag so much because it prevents us from
having a signal, but I hate to think that we lost so much good time in
making and putting it up."

The flag alluded to was sixteen feet long, laboriously made out of ramie
fiber, which was woven, and then dyed, and it was a hard task to haul
the pole, which was over fifty feet long, from the forest ten miles
away, to say nothing of the labor required to raise it.

As soon as the thoroughly drenched material at the boathouse could be
brought out and dried in the sun, which now came out bright and warm,
the work proceeded with renewed vigor. Late that evening the Professor
appeared at the rear of the laboratory, and called loudly to the boys.

When they appeared at the laboratory he was laughing immoderately, and
Angel stood on one of the tables with a simian grin.

"What is the matter? Has Angel been experimenting again?"

Before the Professor could answer, George caught sight of the flag.

"What! The flag! Where did you get it?"

"Ask Angel."

The boys laughed, and George actually hugged the animal, in his delight.
Did Angel know what he had done? Ask those delvers into the mysterious
realms of thought, what prompted him to search for and restore the flag?
Is that any more remarkable than the recorded tricks of dogs and many
other animals?

You know just how boys can laugh when they are really happy. Angel
imitated that laugh, and he had not been taught to do it, either. It
came without teaching.

When the Professor had wiped away some of the tears which had come from
the excess of laughter at the imitating efforts of the animal, he said:

"Did it ever occur to you why Angel has always had a solemn look? The
facial expression seldom, if ever, changes, and they rarely ever exhibit
mirth. You may imagine the condition of those animals, living in the
forests, with enemies all about them, and the struggle for existence an
everlasting one. They have never known amusing incidents as we
understand them. Naturally, the muscles of mobility in the face, which
express pleasure, never have been exercised, and those indicating fear
and anger unduly developed. Here is Angel, in a new atmosphere, where he
sees delight depicted on the countenance, and, gifted as he is, with
wonderful powers of imitation, has learned to actually laugh, and to
enjoy the scene."

"Well, Professor, as we have one of the guns polished up and completed,
wouldn't it be well to make the bullets?"

"For that purpose I suggest that we make the molds out of a metal or
alloy which has a higher fusing point than lead."

"What is best for the purpose?"

"We might make an alloy of copper and zinc."

"Oh! You mean brass?"

"Yes; that is readily cast and easily worked."

"But what shape shall we make the bullets?"

"They should be made long, with a pointed forward end."

"Why is a long bullet better than a round or globe-shaped ball?"

"There are several very important reasons. First, momentum is a prime
element in a missile. A long one contains double the metal of a
spherical one. Second, it can be made so that it will expand when the
explosion of the powder takes place."

"In what way does it expand?"

"You have noticed that the rear end of the bullet has a cavity. When the
explosion takes place the thin shell at the rear end of the bullet
expands, so that it tightly hugs the bore of the gun."

"What is the object of having it do that?"

"To give the ball the benefit of the charge of powder exploded. If it
does not fit tightly in the bore, more or less of the powder will pass
the ball, and thus the ball loses part of its force."

"What is the object of rifling the gun?"

"The object is to impart to the bullet a spiral motion, as it moves
through the air. Metals have not the same density on all sides and this
is particularly true of molded balls. As a result, when projected from
the gun, the heaviest side has a tendency to divert the ball and make it
more or less erratic in its motion, and, therefore, inaccurate. The
spiral motion has the effect of minimizing this difficulty. The cavity
formed at the rear of the projectile was devised particularly to cause
the thin lip of the bullet to be driven into the grooves formed in the
gun barrel, and by that means the boring motion was transmitted to the
bullet."

"But as we have no means of rifling our guns, there will be no necessity
of putting the cavity in the rear end of our bullets."

"We must have the cavity there, by all means."

"What for?"

"Simply because we do not want the bullet to turn around and travel end
over end after it leaves the gun."

"How does the cavity prevent this?"

"You have probably forgotten that a body travels through the air with
its heaviest end foremost. When a cavity is made it is lighter at that
end. Without the cavity, if the forward end is pointed, it will, on
leaving the gun, turn around and go through the air with the blunt end
foremost."

The molds were made, as directed, of a hard brass composition, and when
they were ready to cast them the Professor cautioned against making any
castings with the molds in any position except upright, so that any
inequality in the density of the metal would not form itself on the side
of the cast article.

[Illustration: _Fig. 11. THE BULLET_]

Quite a time had now elapsed since the last exploration of the cave
beyond Observation Hill. The Professor had spoken about it on several
occasions. For some reason he was intensely interested in doing that. In
fact, he appeared to be more concerned about that than any other of the
unknown things about the island.

The boys could not understand this peculiarity. He had never been
questioned on the subject directly, but it was evident he had a reason
for this predominating wish to continue the exploration.

George was just as much interested, but, as the sequel will show, for an
entirely different reason. Ever restless, and always willing to
undertake anything which promised to delve into hidden things, he
approached the Professor one day with the suggestion about the cave.

"I think we ought to take one day off and go to the cave."

The Professor was interested at once. "It will not do to attempt it
now."

"And why not?"

"I am afraid we could not get in very far, unless we had a boat."

"Then why not use our lifeboat?"

This suggestion met with instant favor.

"True, I had forgotten about that."

It did not take George long to reach Harry with the news that the cave
was to be explored by means of the boat. After considering the matter
for some time it was decided to put off the trip for several days at
least, principally because the late heavy rains had, in all probability,
so filled the cave that they might be stopped in their progress before
going very far.

It should be stated that when they entered the cave the first time,
water was found about two hundred feet from its mouth and that barred
their further progress. On the second trip the water had receded, so
they could go in six hundred feet before coming to the water's edge. The
late rains may have filled the cavities, thus making progress still more
difficult.

Harry was carrying forward the boat construction, and by the occasional
aid of George was bringing the hull to a completed state. While this was
being done, George was at work with the loom, slowly weaving out the
fabric for the sails. As the mast had been stepped back over six feet
from the prow, it was concluded to make a mainsail and a jib, a small
triangular sail which is attached to the forwardly projecting jib-boom.
The two sails would afford greater speed than a single sail, and that
was one consideration. The other was, that with two sails the mast would
not need to be so long, and the dimension of the mainsail could be
reduced, and still get the same efficiency.

[Illustration: _Fig. 12. THE SEA-GOING BOAT_]

The weaving of a large sail in one piece was impossible, as the loom
could turn out goods only thirty inches wide, and as it could be
operated by hand power solely, it will be seen that the sails required
not only time, but an immense amount of patience. It is no wonder that
George was anxious to take a day off at the cave, or anywhere else that
afforded a change.

While at work Angel was his constant companion. It is remarkable what a
degree of friendship and companionship grew up between the two. In the
course of time the weaving process became so familiar to Angel that
whenever George would throw the bobbin, containing the weft, through the
opening of the woof threads, the animal stood ready to pull the heddles
forward, so as to force the last weft thread up against the one
previously threaded across.



CHAPTER V

THE VOYAGE FOR THE BENEFIT OF ANGEL, AND THE DISCOVERY


Within the next week the boat hull was practically completed, and now
needed caulking. For this purpose the hemp, which had been found, as
previously stated, was broken up, and as much of the woody portions
removed as could be taken out, so as to make it available for filling in
the crevices between the planking.

The mast was stepped in, and a sufficient quantity of manilla rope
twisted for the sails, and also a supply put aboard for other needs. The
sails were not yet completed, but they would doubtless be ready by the
time the other parts were.

In one of their evening conferences George expressed his concern about
the future of Angel.

"For my part I do not want to leave him behind."

"Then why not take him with us?" asked the Professor.

Harry had some doubts on this point, but George was too insistent to
brook any thought of leaving him behind.

"I make this suggestion, George: Before the time of sailing it would be
advisable for you to make several trips with Angel in the small boat,
and see how he behaves. In some respects he would be an acquisition to
us."

The boys had not forgotten how the animal, during their various trips,
had been of material assistance, nor the times when nutting how Angel
understood what they were after, and would climb trees and shower them
down, and then gravely help to load them into the wagon; and they
remembered the recovery of the flag. Such service was appreciated.

As it was, Angel was invited to take a sail. The lifeboat recovered in
South River had been named No. 2, as they insisted on calling their own
wrecked vessel No. 1.

No. 2 was launched. A small sail, had been rigged up, and two good oars
provided for it. Angel was completely at the command of George, and when
he was called and taken down to the landing in front of the boathouse,
he went without any hesitancy. But to induce him to enter the boat was
another matter.

Suspecting there would be some difficulty, George pulled a small jar of
honey from his pocket, and silently began to eat it. Angel's eyes
blinked. It was such an unheard of thing for George to do this without
extending an invitation to join. He shambled over, but George walked to
the boat and sat down in it, not appearing to notice the eager look on
the animal's face.

Without further urging he stepped aboard, and George put his arm around
him, as Harry, with oar in hand, pushed the boat from the shore. Angel
was startled, and tried to get away, but soothing words soon quieted
him, and before they reached the mouth of the Cataract he was leaning
over the gunwale and playing with the water in the most approved
boy-like fashion.

When, however, they had passed the comparatively calm waters in the
estuary, and were rounding the cliffs, poor Angel forgot his sport, and
sat as one paralyzed, gazing at the sight of the waves beating against
the shore line. George went up to him, and spoke encouragingly, and it
was fully a half hour before he was restored to his usual calm. Then,
apparently, he noticed for the first time the peculiar rocking motion of
the vessel. Every time it swayed to the right or to the left he would
give that peculiar chuckle which always indicated delight.

They went around the point to the east, and passed down the coast in a
southerly direction, going as far as the cape north and east of the
mouth of South River.

"Steer for the shore, George; steer for the shore; what is that to the
right?" said Harry, pointing to the beach.

"It looks like a boat, sure enough."

As the wind was coming directly from the shore they had to depend on the
oars to bring the vessel around, and as they came in could distinctly
make out the side of a boat lying among debris, in an inclined position,
against a rather steep beach.

"It is our boat, Harry." The moment their vessel came alongside, Angel
jumped off and leaped over to the boat on the shore. Evidently he also
had recognized it.

"Well, isn't this a find?"

"How long do you suppose this has been here? I am glad we gave Angel an
outing."

"Shall we take it with us?"

"Yes; if we have to carry it overland," was Harry's reply.

"Let us float it."

It was not much of a task to do this, and with a short rope it was
hitched to the stern of No. 2. Angel remained in the recovered boat, and
when No. 2 was pushed from the shore, and the sail set, its movement did
not seem to perturb him in the least, but when the oscillations again
began to be perceptible, he commenced to gurgle, and George knew they
had a good sailor to take with them.

The sail took a little over three hours, and as they passed up the
Cataract River, and approached their home, the boys set up a welcoming
shriek, in imitation of incoming steamers, which so delighted Angel that
he scampered in a delirium of joy from one end of the craft to the
other. It is doubtful whether he had ever in his short life had such a
glorious time, and that he remembered it his subsequent history
furnishes the best evidence.

The Professor was just as much delighted as the boys at the sight of
their first marine production, which had gotten away from them and
stranded them on the cliffs three months before. "I am sorry now that
you named the other boats, because this is really No. 1."

"Never mind; this is good enough to be No. 3. Just look at our navy!"

"Where did you find it?"

"Near the point, south of the bay."

"Then it must have been washed there during the late storms, because I
do not think it is possible that it could have gone there at the time it
escaped you, as the wind was blowing directly to the west at that time."

The boys now remembered the circumstance, and as they recalled the
condition of the driftwood around it when they found it on the beach, it
was plain that the storm had been their friend in this case.

"Have you been using oars on the boat?" was the Professor's inquiry, as
he bent over the side and examined the notches which were made for the
oars.

"No; why do you ask?"

"This boat has been used by some one, and not very long ago, at that.
Notice how the forward sides of these notches are worn. It also seems
that civilized people have been using the boat."

The information was so startling that neither of the boys could answer
for a moment. Did they have another mystery to contend with?

But George was alert on the questioning end of any proposition. "Do you
really think white people have had the boat? I do not see anything that
would make you think so."

"If they were savages they wouldn't use the oarlocks or notches, as they
row free-hand, almost without exception; but get a white man in a boat,
and the first thing he looks for is a place to put his oars in. This
incident in itself shows one of the distinguishing features between the
civilized and the uncivilized people."

"In what way is one civilized and the other not?"

"I did not say one was civilized and the other uncivilized. The most
wonderful thing in the advancement of the human race from a state of
savagery to civilization, was the discovery and utilization of a
fulcrum. Whenever man, in an advanced state, undertakes to do anything,
he uses a fulcrum of some kind."

"In what way is it so useful?"

"Primarily, in the form of a wedge, a pulley, a wheel and axle, an
inclined plane, a screw or a lever. All these forms do the same thing as
the simple lever; and what sort of mechanism could be made without some
of these elements? The row-lock is simply the fulcrum for the oar, is it
not? When Archimedes discovered the principles of the lever, he was so
excited that he declared he could move the earth if he could find a
fulcrum."

A careful examination of the notched gunwale showed conclusively that it
had been used to a considerable extent. George sat and pondered over
this. "I am sure we never used the boat enough with the oars to wear it
in this way. Had you examined this when you said that the boat had not
been long at the point where we found it?"

"No," answered the Professor; "I simply remembered that on the day you
lost it the wind was blowing to the west, and as you found it to the
east of the cliffs, I inferred it must have been carried around since
that time."

"It is evident then that the people who used this boat live to the west
of us?"

"That is my only conclusion."

"Then you think the fire in the forest, and the light which we saw that
night beyond the West River, were made by those people?"

"I am sure the fire we saw was made by savages, but I am not so certain
about the lights having been made by them."

Harry looked at the Professor, and then at George, and slowly shook his
head. "Wasn't it lucky we didn't meet them when we made our trip to the
river?"

That evening the inevitable subject of their forthcoming voyage was
again discussed, and to the surprise of the boys, the Professor urged
delay. His reasons were expressed as follows:

"While we have had some very severe storms of the kind which may be
expected, we are not sure that the weather is yet fully settled. That is
the only reason I urge delay. If, on the other hand, we should decide to
take an overland journey, we could set out at once."

Harry was opposed to taking another trip by land. "We have really found
out more by the water route than going by land. For that reason it would
be well for us to make at least one adventure by sea."

These arguments prevailed in the minds of all, and while it would take
some time before all preparations could be made, all were happy at the
thought that when they did undertake the journey something definite
would be learned to clear up a few of the mysteries of Wonder Island.

The Professor did find some samples of tourmaline, in a finely divided
state, and this gem was used to polish the gun barrels, so that all the
weapons were finally put into condition where they could be used. During
an hour each day all took a part in practicing in a range specially
prepared near the workshop. Distances were laid off accurately, and the
regulation targets set up. In this manner they became accustomed to
loading and firing with facility and a considerable degree of accuracy.

If anyone, not knowing the situation, had dropped in on this scene, he
would have considered himself in the midst of a great naval and military
camp. At the workshop were the guns, arranged in order; boxes provided
for the bullets; small turned out wooden cups for powder, each cup
carrying twenty little tubes of bamboo, each with a measured charge of
powder, and longer bamboo tubes with percussion caps in them.

It was Harry's brilliant idea to separate each charge of powder and put
it into a special tube. This tube had one end closed, and the other
provided with a stopper, so that in loading the stopper could be drawn
out and held by the teeth while the powder was poured into the gun. The
caps were put into a bamboo tube which was just large enough to take the
caps, which were dropped in, one after the other, and it can be seen
that it would be an easy matter to turn the tube upside down, and thus
bring out one cap at a time. This also facilitated the reloading of the
gun.

During the practice with the gun one serious defect was found; and that
was to remove the cap after each shot. Sometimes the body of the cap
would not split, and as a result, a knife or some pointed instrument
would have to be employed to dislodge it so as to make room for the new
cap.

Harry found a way to remedy this. An opening was made through the stock
at one side, and a sliding piece, like a collar, put over the nipple
which holds the cap. A finger attached to this collar enabled the
marksman to draw back the collar, and this would bring with it the cap,
which would then fall out of the side opening.

All these little details may seem to be useless care, but rapidity in
loading and firing, with muzzle-loaders, in an engagement might be their
salvation.

A test was made of the improved firearm, to determine how fast the gun
could be loaded and fired. The test made by Harry showed that it took
two seconds, after a shot, to bring down the piece, and draw back the
collar to release the cap; three seconds to grasp one of the powder
tubes, remove the stopper and bring it to the muzzle of the gun; two
seconds to pour in the powder; two seconds to drop the tube in its
receptacle and grasp the bullet; two seconds to ram it home, and three
seconds to put on the cap and cock the gun for firing. That was nearly a
quarter of a minute.

He was very much dissatisfied with this exhibition of speed--or rather
of slowness, so after considering the matter for some time, hit upon the
plan of reducing the rear end of the bullet, so he could wrap a paper
tube on that and tie it. Then he purposed filling the tube with powder,
and closing the rear end by folding over the end of the tube. In this
way he would entirely overcome the need of the little bamboo tubes for
holding the powder.

But no paper was available, nor could he think of anything which could
be used as a substitute. In despair he repaired to the Professor.

"What is the difficulty now?" said the Professor, with a smile.

"No difficulty, particularly, but I wish we could have paper, or
something like it. I want to make cartridges."

"I thought you had all that arranged for?"

"So I did, but it takes me a quarter of a minute to load, and I must do
better than that."

He mused a while. "We could make paper, and I think we have the
facilities at hand for doing it; but it will take quite a time to
arrange for it. Aside from that I do not, at this moment, know of
anything which will be a fair substitute."

He was chagrined at this failure. But, after all, four shots a minute
were not so bad. The perfection of the guns must await their return.

Now, let us go down to the marine works, on the shore below the
Cataract. Here were the three vessels lined up side by side, and also
the after part of the lifeboat. The shed, which was the boathouse, had
nearly all their tools, and besides the bench, was a forge and the
primitive blower which the Professor and George had made and set up.
Wood, parts of planks, thin boards, of all sorts and description, were
scattered about. It looked business-like, and Harry was intensely proud
of it.

The sail was completed, and taken down to be bent on the cable. The jib
had already been installed in place, and when the sails were hoisted and
they walked out from the shore and glanced back to get a full view, the
entire Naval Bureau congratulated itself on the magnificent appearance
of the fleet, and particularly of the new creation in maritime
architecture.

It is not out of place to say that the Professor and George both
showered the highest compliments on Harry, for he deserved it. But the
officials of the establishment were not the only ones to admire the fine
sight. Angel came, and he took it in. It was the finest climbing he had
enjoyed in many a day. The Professor took off his hat. "I propose three
cheers for our ship."

They were given, and with each cheer the hats circled their heads. This
was a new code of procedure to Angel. He couldn't understand it. Without
waiting for explanations, he shot down the mast, and landed on shore. It
was the most comical proceeding they had ever witnessed on his part, and
when he looked at the group, and then at the ship, he said as plainly as
though he had uttered it: "What does all this mean?"

When the laughter was over, George proposed three cheers for Angel. The
hats came off and the cheers were given. Then the same smile which he
had so well learned illuminated his projecting face, and he swung his
long arm around as he had seen it done, and another step had been taken
in his education.



CHAPTER VI

THE GRUESOME FINDS IN THE CAVE


Another week had thus passed by--seven days of unceasing toil. The
Professor again brought up the subject of the cave. The subject did not
need any argument. It fell on willing ears.

"How shall we take the boat around?" was the matter which interested
George.

"Sail it around, of course," was Harry's view.

Both looked at the Professor. "If we sail it there, which will be an
easy matter, how can we haul it up the sides of the cliffs? From my
present recollection the mouth of the cave is fully thirty feet or more
from the water line. The air pocket is not over eight or ten feet. At
any rate, it is much lower."

"Then why not haul it around on the wagon, and lower it down the walls?"

"That seems the most feasible plan."

They now knew what preparations were needed for the exploration. Two
lamps had been taken before, and one was lost in the cave. Since that
several more had been made, so that three were provided, together with a
supply of matches.

When the wagon was ready the Professor brought out several boards, and
deposited them in the wagon. The boys looked at the boards inquiringly,
as the Professor turned back from the wagon. "Oh, yes, the boards; we
want something to write on so that we can chart the cave. We must not be
caught as we were the last time."

"But how can we possibly chart the cave when we have only one boat?" And
George laughed at the idea of making a plan of the interior by standing
at one point.

"You measured the height of the falls without going to the top, if you
will remember."

He had forgotten that. But the boat was at last secured in the wagon,
and proceeded to the cliffs. It was fortunate that the team could be
taken to a point directly over the mouth of the cave, and in a little
while the ropes were attached to it and slowly lowered, Harry taking the
precaution to follow it down and to dislodge it from the steps which
appeared in its path.

The team was then securely hitched, and taking all their implements,
such as lamps and boards, together with two of the guns and an ample
supply of ammunition, descended to the entrance. The boat was at the
mouth, and it was suggested that a preliminary survey of the interior
should first be made, in order to ascertain how far the boat would have
to be carried before reaching the water.

The lamps were lighted, and the boys led the way. After passing the
point, about two hundred feet from the mouth, and at almost the
identical spot where the water was found at the first exploration, the
water glistened before them. Returning toward the opening a loud beating
sound was heard, which at first startled them. It was evidently at the
mouth of the cave. It sounded like the beating of a stick against some
hard substance.

The nearer they came to daylight, the more distinct were the sounds. As
heretofore explained, near the entrance the cave made a turn to the
right at an angle, so that when at a distance of fifty feet from the
opening it was impossible to see daylight, except what little was
diffracted from the angle at the turn.

This angle was reached, and the beating, rather irregular, was plain
enough to cause some alarm. The boat was beyond the open mouth and at
one side, so that it could not be seen by anyone within the recessed
walls.

All stood still, while the beatings continued. Occasionally there would
be a cessation, to be repeated again. Whatever it was it was not far
away. The Professor whispered: "Get the guns ready; we must take some
chances."

Cautiously the company moved forward; the end of the boat first appeared
in sight, and as George peered beyond the projecting point of the ledge,
he threw up his hands and burst out in laughter. Angel was in the boat,
imitating Harry in the building operation. The sudden appearance did not
startle him in the least, nor did he stop beating his lullaby, after he
noticed the broad smiles that greeted him.

With an eye to every advantage, Harry had attached to the sides of the
boat, amidships, two short standards, about three feet high, on top of
which two of the lamps were mounted, so they would be out of the way,
and thus give them freedom to handle the oars and the weapons, as well
as afford them a better light, than if carried by hand. The Professor
was much pleased with this arrangement.

The boat was not particularly heavy, but it was a task to drag it over
the uneven floor and along the tortuous path which had to be taken by
their burden, but when the water was reached they were repaid for the
labor by the ease with which they could explore the interior.

Before starting the journey the Professor, as usual, uttered a few words
of advice: "One of us must sit in the bow, one at the stern, and the
other amidships. The one at the stern must propel the boat, as we cannot
row through many of the places, and as the water is not deep, that will
not be a difficult task. The ones at the bow and amidships should have
the guns, and if there is no objection, I will take my place on the
middle seat, where I can best take the observations on the way. The
other places you should decide between yourselves."

"I am willing to take the bow, if Harry agrees." Harry sanctioned the
arrangement, and when the lamps were securely fastened, Harry pushed the
boat forward through the cavern. It did not take long to reach the
slight turn which led to the large chamber, which was over one hundred
feet long.

On the way to the chamber Harry had an opportunity to measure the depths
of the water, and at intervals the Professor would call out for the
depths, as he was making notes of the descent formed by the floor to the
chamber. The oars gave a pretty fair idea, showing that the floor was
only about five feet lower at the chamber than where the boat was
launched.

Reaching the chamber Harry was directed to steer it to the right and
skirt the wall going to the left, so that every part of it could be
examined.

[Illustration: _Fig. 13 THE TREASURE CAVE_]

"I have another reason for this careful examination," remarked the
Professor, as he was intently engaged in making notes on the board
tablets. "It may be likely that the chamber has more than one outlet and
if so, we must explore it also. Of course, I am most interested in the
outlet to the south."

A circuit was made until they reached the outlet to the south, which
Harry had discovered when the light on the ledge disappeared. The water
throughout the cavern within the chamber was not over eight feet deep,
and at the outlet to the south he could not touch bottom with the
twelve-foot pole they carried. This outlet was contracted, and, judging
from the width of the boat, could not be more than eight feet across,
but it gradually widened, and the waters became shallower as they
advanced.

George, who was in the bow, held up his hand as a warning. "Stop!" was
all he said. All peered forward. The lights threw their beams forwardly
through a broadening channel, beyond which appeared to be white forms
ranged along the opposite wall.

"What depth have you, Harry?" asked the Professor, without seeming at
all concerned.

"About five feet."

"Move straight ahead, until I tell you to stop."

The pole was thrust down and the boat moved forwardly fully fifty feet
before a halt was called.

"I think we are now in the middle of this chamber. Before exploring it
let us make a thorough examination of its characteristics."

"Look at those wonderful icicles hanging from the roof!" George gazed on
them with wonder and admiration. Harry, on the other hand, with the
utilitarian idea in his mind, inquired: "Why couldn't all that chalk be
utilized for making plaster?"

"That product is used in the arts, but it costs too much to transport it
from the places where it is found in its natural state, as science has
found a much cheaper way of producing it from limestone."

"Are all these rocks limestone?"

"Beyond question. Only a few of the caves so far found are in any other
formation than limestone."

"What kind of cave are those?"

"Where they have been produced by volcanic action. There the walls are
of volcanic rock."

"Why is it that these underground channels are formed in this way?"

"They are formed by the erosive action of the water wearing out the
softer portions of the rock beneath a harder roof or wall. This action
is brought about by carbonic acid acting on the rock and producing what
is called carbonate of lime, and the stalactites and stalagmites found
in all these caverns are of that material."

"What is the difference between the two names you have just mentioned?"

"Stalactite means trickling or dropping, and as applied to these
formations it means conical or cylindrical accretions of the carbonate.
Stalagmite is the term used to designate the calcareous formations found
on the floors of caverns, which are usually the droppings from the
roof."

"Where are most of the caves found?"

"They occur most frequently along rocky shores of open seas, as in this
case. Some of them are celebrated for their great extent, others for
their gorgeous interiors, like this chamber. Some show the most
beautiful draperies, or veils; in some cases portions of the ceiling
have representations of magnificent inverted candelabra, and what appear
to be carvings in the purest white."

"In what parts of the world are most of them found?"

"It does not seem that any portion of the world has a monopoly. The most
celebrated are the grotto of Antiparas, in Greece; the Adelsberg caverns
in Carniola, and the Mammoth in Kentucky. The latter is the largest in
the world, the windings of which extend forty miles and through which is
a subterranean river. In the river are eyeless fish, and fish with eyes,
but sightless. Others are the Luray, in Virginia; the Wyandotte, in
Indiana; Weir's, in Virginia; the Big Saltpeter, in Missouri, and
Ball's, in New York. Of seashore caverns, the most famous and remarkable
is Fingal's, on the coast of Scotland. Extensive caves are also found in
the Azores, Canary Islands, in Iceland, in various portions of England,
France and Belgium. Many of them are of immense value to the
paleontologist."

"In what way are they of any use?"

"They have been of the greatest service, because in the early days of
man, and before he knew enough to build his own habitation, he made the
cave his home. You have heard of the 'cave man,' have you not? During
the old stone period in England and other European countries, these
caverns were the only abodes of man, and in them have been found layers
from twenty to thirty feet thick, of successive accretions of bone,
stalagmites and various articles of human manufacture."

This information added interest to the examination of the walls, and the
eagerness of the boys to discover something new and startling was at its
keenest edge. Before they had made a half circuit George announced that
he could see a large opening, which turned to the right, and thus formed
a bend to the general direction that the cavern had made.

A digression is necessary, in order to be able to understand all the
elements in this remarkable voyage. The mouth of the cave was northeast
of the Cataract home, and distant about a half mile, in a straight line.
The opening for the first six hundred feet, which had been charted by
them on the previous occasion, ran directly south, but from that point
it turned toward the southwest, and this now, in a measure, explained
the eagerness of the Professor to explore it, as he believed the cavern
led to a point near their home.

"There is no water in the opening," was the further information from
George, as they approached the contracted end of the chamber.

"Before we land let us see the other side of the chamber," was the
Professor's suggestion.

The boat was veered around to the left, and before they had proceeded
fifty feet it was apparent that a similar opening led out to the south,
and a dry floor was visible, like in the other outlet. The boat was
landed, and drawn up, two of the lamps taken out and the guns examined.
The opening led into a second chamber, which looked like a canopied
grotto of marble. Where they stood the chamber had the appearance of a
huge letter A, the side walls of which ran together in the distance, but
these walls were broken up by the most enchanting series of columns, and
delicate entablatures, and the outlines of the figures were like
blanched frescoes. It was such a weird and startling sight that the boys
could not repress their amazement.

After they had fully entered the chamber Harry's quick eye caught a
peculiar formation to the right, on a raised sort of platform, behind
which seemed to be a recess. He had noticed it because it contrasted so
strangely with the uniformly white glare of all the surrounding
surfaces. He quickly made his way across, and as he reached it, stepped
back in alarm.

"Come here, quickly; are those skulls and skeletons?"

The Professor did not need a second invitation. Scattered about on the
elevation were found four skulls, and the bones comprising the remains
of four human beings. The skulls were first arranged side by side, and
the Professor intently examined them.

"These are skulls of the Caucasian race, beyond a doubt. All are,
apparently, well formed and normal. But what is this?"

In the side of one skull was a perforation, with the bone fractured on
all sides of the orifice.

"Do you think it is a bullet wound?"

"It has that appearance. As there seems to be no corresponding hole in
any other portion of the skull, we may be able to find the missile
inside, if death was caused by that means."

Harry had noticed a rattling sound when the skull was put in place, and
mentioned this. After some hesitation the course of the fractured
opening was traced through, and embedded near the top and on the
opposite side, was a large lead ball, or what had been, undoubtedly,
spherically shaped before it entered and passed through the bones.

"This is evidence to me that these remains have been here a long time."

"Why; because it is in the form of a ball, and not a bullet?"

"Yes; and there is also another reason why these people came here and
met their fate many, many years ago."

"What is that?"

"In this calcareous formation the preservative qualities of the
carbonates would prevent rapid decomposition. These skulls are turning
to the same material that we see all about us. See how brittle the bones
are. Our bones are of lime formation, being largely composed of the
carbonate, the same as the stalactites."

The other substances now lying about were noticed. The excitement
engendered at the sight of the bones was enough temporarily to blind
them to the numerous things found scattered about. Here was a dirk, the
edges entirely worn away, and whitened. There were the metal ribs of
what seemed to be a case, or a receptacle of some kind. Lying at one
side was an ancient type of firearm, long, heavy, and with an immense
bore. Another and another were found--a regular arsenal, with the
scattered remnants of peculiar little copper receptacles with whitish
powder in them.

Harry, who was about to remove the powder, was stopped by the Professor.
"We must retain everything as we find it, as nearly as possible. We do
not yet know what the little vessels contain."

Not an article of clothing thus far had been found. A little higher up
on the platform, two more skeletons were seen, both of which had
fractured skulls, one of them showing two cavities which could not have
been accidental, as both showed the same kind of fracture, and inclined
across the skull in the same direction on the left side.

Alongside these skeletons were more of the long, wicked-looking firearms
which had been found previously near the other bodies. There was every
evidence to show that a terrible fight had terminated the existence of
the band. More long knives, with curiously wrought handles, were lying
behind the last skeletons, and on a more careful examination, a knife of
an entirely different pattern was found within the ribbed cavity of one
of them.

Still farther back, new articles appeared. Articles of furniture, many
of them coated with the fallen carbonates; and here were the first
articles of clothing, some of which were so decomposed as to crumble at
the touch. Others were still firm. Some of the articles, like a mantle,
had threads intact running in one direction, and the other cross thread
all converted into dust, which disappeared when the garment was held up.

On some of the garments were metal trimmings. "They look like silver,"
said George, excitedly; "and what is this? It seems to be silver," as he
brushed a bracelet-like piece of ornamentation with the sleeve of his
coat. As they advanced new articles came in sight; a bench; a veritable
chair, or couch, the covering of which was there merely to give it form,
but the substance had gone. Only the wood remained and that largely
decayed.

And now on every side, at the rear and along the walls of the recess,
were evidences of human habitation. Cutlasses, knives, and at one side,
what appeared to be the kitchen, were numerous pots and kettles of
various sizes and descriptions, nearly all of them of copper.

"How could they possibly cook in here without being smothered to death?"
asked Harry.

"The cavern seems to be large enough to take care of all the smoke," was
the Professor's reply.

"Well, I don't understand why they should have taken the trouble to come
in such a long distance, when they would be just as safe nearer the
mouth?"

"Before we leave this place we may be able to answer your two questions
in a way that will surprise, if not startle, you," was the Professor's
answer.

This vague reply did not detract any from the interest which the boys
took in the search.



CHAPTER VII

THE TREASURES OF THE CAVE


While Harry was in the act of drawing back one of the couches, an object
behind it seemed to fall apart with a jingling sound.

"What was that?" exclaimed George.

"I think we have found something here that will make us do some
thinking," answered Harry, as he bent down to take up some of the
detached pieces which came from what now appeared to be a large chest.
He picked up one of the round pieces. "Gold, gold; look at it!"

"I suspected something of the kind when I saw the skeletons. Carefully,
boys; let us remove this piece of furniture. Undoubtedly, we are in
pirates' lair, and here is the booty."

[Illustration: _"We have probably found a pirate's lair, and here is the
booty"_]

The boys were too much overcome for words. They looked at the gold, and
then at each other. George arose and walked back and forth. Harry, with
the coin in his hand, brushed it and held it close to the light.

"With this we can buy anything we want," George finally uttered.

"Whom will you buy it from?" was Harry reply. The Professor only smiled.
Of what use was money to them? George had forgotten that.

"Here is another one."

"Another what?"

"A chest, something like yours." The lid, with its mocking lock, opened
easily, and there, coated with the universal carbonate, were a mass of
coins, articles of ornament, rings, bracelets, and pieces the names or
uses of which were entirely unknown to them.

"Now that we have them, what shall be done with the treasures?"

The boys did not answer for some time. Here was wealth; more, probably,
than either had ever dreamed of; but it was of no earthly use to them.
They must, of course, preserve it. They had discovered it, and under all
the laws were entitled to possession.

"Well, have we gotten together all the gold and silver and precious
stones? Just imagine us as buccaneers! Owners of an island we haven't
conquered, and possessors of a fortune without working for it!" and the
Professor laughed at the thought of it. The boys, too, laughed, but when
they looked over at the ghastly skeletons, the joy was suddenly checked.

The Professor saw the reason. "Isn't this a sermon? You have become
acquainted with it early in life; some learn it very late, and others
never get the lesson. Riches; death! Possessors of every material thing
that earth can give, and the grave beyond it! The unfortunates there had
all this, but their skeletons have stood guard over it for a century or
more."

The Professor still smiled, but the boys were very grave. It was,
indeed, an impressive lesson.

"Why are you so quiet? Are you mourning for them?" Then, without waiting
for more gloomy feelings, he continued: "How high above the mouth of the
cave do you think we are?"

This sudden change in the tone of the Professor was almost startling to
them. How indifferent! It appeared almost like desecration.

"I have no idea," was Harry's faltering reply. He looked around to
assure himself that it was not all a dream. The sudden acquisition of
what appeared to be an immense store of wealth, the ghastly relics
below, seemed to stun him.

"Have you a reason for wanting to know how high up we are?" asked George
when he had partially recovered.

"You wanted to know a little while ago how the smoke in the cavern might
affect them. Haven't you noticed a perceptible movement in the
atmosphere since we entered the chamber?"

The boys started and stared at him. Could it be that the cave had an
outlet in the hills?

"Was that the reason you suggested we should make a circuit around the
chamber after we entered it?"

"Yes; and I know where the outlet is."

"And does that explain why the pirates made their home at this end?"

"Undoubtedly; and what will be still more interesting information is,
that the opening is within sight of the cataract."

Could anything be more exciting than this information?

"I now see the reason why you always wanted to come back to the cave.
Did you suspect this when we first entered the cave?"

"No; but I had an idea we should find this after we made our second
trip."

"What did you see?"

"Nothing but what Harry brought to me."

"What was that?" both exclaimed, eagerly.

"The slab of carbonate which Harry brought me for the marking tablet,
and on which we made the chart of the cave."

"What did you find on it?"

"If you will recall, I brought it with me. It is now in the boat." Harry
dashed down to the boat and brought it back, turning it over and over on
the way.

The slab referred to was about two inches thick, a foot long, and
probably ten inches wide, a little irregular in formation.

"When we returned home that evening, after the trip referred to, I took
the slab and transferred the chart we had made to a board. In doing so,
I noticed that the lime had been chipped away from one side, but that
did not cause me to make any investigation at the time.

"Some days afterwards I again took it up, and could see plainly through
the carbonate what appeared to be the shadows of some characters, and it
at once occurred to me that, owing to the sunlight and the comparatively
dry atmosphere in which it had been kept after its removal, that the
lime would turn or change its color, but the lime on this background did
not change in the same degree where the characters had been placed, and
when we get into the sunlight you will be able to see just what I saw."

Looking at the slab, there was nothing to indicate any characters
imprinted in it.

"Where is the opening, Professor?"

"Come here; directly below where we found the first skeleton; keep the
light back in the recess; there; now look to the left and see that small
streak of light about ten feet from the floor."

George could restrain himself no longer, but rushed forward. As he
crossed a slightly elevated obstruction, his foot caught on a spur and
he pitched forward. Harry, who was following, saw him fall. George,
slightly stunned, had raised himself partly as Harry came up. When Harry
saw him he was arising from a nest of bones which showed the remains of
two more pirates, the two skulls lying close together, directly behind
the little ridge over which George had fallen.

"Here are some more of them," cried Harry, as the Professor came up.
"What a fight they must have had!"

The outlet at this point was fully eight feet wide, and without the
lights it was still too dark to distinguish anything. George's light had
been extinguished in the fall, but Harry's lamp was still available, and
all were eager now to find the outlet. Harry now led the way, and within
seventy-five feet, at a pronounced angle in the throat of the cave, he
recognized the first real glimmer of sunlight.

"See the steps here!" was his cry. And beyond, as plainly formed as
though cut a year ago, instead of a century, were steps leading up to a
contracted opening, partly hidden by shrubbery.

When Harry emerged from the opening, the first sight that met his gaze,
after he had fully recovered the use of his eyes, was their home, not a
thousand feet away. George brushed his way out, and he stood there, not
knowing whether to run or to shout or to cry. Every emotion appealed to
the boys for mastery. All previous experiences during the past year
paled into insignificance in comparison with the hour just spent in the
pirates' lair.

The opening from which they left the cavern was on the side of a hill,
not particularly steep, formed by projecting strata of limestone, in the
clefts of which vegetation grew, and at a distance the rocks could be
seen only at intervals on account of the shrubbery. No one could
possibly suspect an opening into the walls anywhere along the hillside.
The outlet was not more than twenty feet from the rather level ground,
which sloped off toward the west and in the direction of Cataract River.

They sat there silently for a time, but evidently the Professor was not
disposed to allow too much time for reflections which he knew must be
gloomy to the boys' impressionable minds.

"What are you thinking about, boys? Have you had enough excitement for
one day?"

George was the first to reply: "I have been thinking about what we ought
to do with the gold."

"Why the gold? I have been thinking of the boat."

"Do you think we ought to leave the gold there? Isn't that of more
importance than the boat?"

"I do not think so, George; we can use the boat to good advantage, but
where can you utilize the gold?"

"But why would it not be a good idea to get it out and take it over to
the Cataract?"

"I should advise against that very strongly."

"What are your reasons?"

"Suppose we should be attacked at the Cataract and find the home
untenable; this place would be a safe retreat, and we should, in any
event, have our treasure here in safety. It has been secure for the last
century or so. I think it will keep for a few months more."

"It had never occurred to me that we could use this place for such a
purpose. That is a capital idea. And did you have this in mind all
along, Professor?"

"Yes."

After a time, when the subjects had been fully discussed, it was decided
to try to bring the boat out by the new entrance, and after making all
the measurements, ample room was found for this. They returned and
carried and dragged it to the opening, and after some labor it was
finally pushed through the opening, and when the ropes were attached it
was lowered down the hillside, and dragged to a position where it could
be taken by the team.

"You should go for the team now, and I will continue the explorations
until you return," and so saying, the Professor went up the hill and
entered the cave, leaving one of the lights at the opening.

The boys went back to the mouth of the cave and found the team, as well
as Red Angel, who had remained there, and within a half hour were back
again to the land entrance. The light was still where the Professor had
placed it, and the boys at once entered the passageway, and went down
the steps leading to the pirates' chamber.

All the bones of the skeletons had been removed from the passageway,
where George had fallen, but the other skeletons were in the same place
originally seen when they discovered the remains.

The Professor was not in sight, nor did they see any glimmer of his
light.

It was he, undoubtedly, who had removed the bones from the passageway,
but they did not stop to notice where they were deposited. When they
first came in both were busy discussing the situation, in careless
tones, without any pretense at suppressing their voices, but now that
the Professor was not in sight, and no evidence that he was anywhere
near, the scene about them began to be most weird and uncanny. They
spoke in undertones, and when Harry suggested that they might call the
Professor, and thus let him know of their return, it was some time
before George would consent.

It became evident, as he did not appear, that something must be done,
and Harry shouted loudly, and his voice reechoed through the cavern and
came back to them from every quarter. In a few moments they were
overjoyed to see the glimmer of a light directly to the east, which was
in the opposite portion of the chamber, where, as his light moved
forward, plainly showed another recess, or, probably, an opening similar
to the one through which they had entered from the west side of the
hill.

"Have you been waiting long?" was his inquiry.

"No; we came in less than ten minutes ago. Have you found anything new?"

"Nothing new, but many additional things; but we must take another day
for this."

This was said so significantly that they looked at each other, debating
in their minds whether or not the question should be pursued any
further.

"Haven't you had enough for one day?" and he said this with such a
jovial mien that it restored their composure and satisfied them that
another day would bring the answer that they craved.

As they passed out George turned to the Professor and asked:

"Why did you remove the remains in the passageway?"

"Because I thought it might be well to examine them at our leisure, and
therefore enable us, if possible, to learn something of their history. I
have put them near the steps close to the entrance."

As they passed out he requested Harry to bring up the boards from the
boat, as well as some ropes and part of the canvas, which was usually
carried with them to be used as a means for signaling. The bones were
arranged on the boards, and kept separate from each other; after which
the canvas was severed and tied around the two human frames, to keep
them in place, and deposited in the boat, after it had been loaded in
the wagon.

It was now past two o'clock, and none of them felt any hunger until they
neared home. The trip had occupied over four hours, and hungry as they
were, the reaction, after the stirring events of the day, was so marked
that it was difficult to rouse them sufficiently to prepare the meal.

Somehow, the work at the factory, the building of the boat, and the care
of the stock did not interest them the following day. They went around
like people in dreams. Their thoughts were centered in the cavern on the
hill, and many, many times during the day their eyes involuntarily
turned that way. Was it unnatural that such should be the case? When, if
ever, in the history of human kind had such treasure been bestowed where
the gift had been so lightly considered that they did not even stop long
enough to count its value? It seemed such an unnatural thing to do, and
yet the only feeling was one of curiosity.

During the entire day the boys rarely spoke to the Professor about the
events of the previous day. He was busy in the laboratory with the two
skeletons, and remained secluded.

"What do you think the Professor found in the cave while we were getting
the team?"

"I have had a curiosity to know, as well as yourself. Shall we ask him?"

"I do not think it would be well to do so. You know he is always willing
and anxious to be of service to us and to answer every question; it
looks like an imposition to insist on what he evidently wishes to
avoid."

"That is the feeling I have had. I love him because he has been so
unselfish, and during the time we have been associated, I do not
remember ever having heard him utter an unkind word."

"I have often thought I wish we knew of some way to make him understand
how we appreciate him and his noble ways. You remember the birthday
party we had for him? That touched him, as it did us, and it was the
only time I ever saw him confused or in tears."

"I wish we knew his history. Did you ever hear him say a word about his
friends or relatives? What affects me most is, that when any subject
comes up, he always considers it from the standpoint of service to us.
He never considers himself."



CHAPTER VIII

REMOVING THE VESSELS FROM THE CAVERNS


The boat was finally completed, and the boys were very anxious to have a
sail in it to know how it would act. The utmost care had been taken to
have it well caulked, and it was again put into the water, after all the
leaky spots had been closed up.

For the purpose of the test it was decided to put aboard a load of
stone, of a weight equal to what their contemplated load would be, and
this they estimated, not counting their combined weight, at six hundred
pounds. This would be ample for all purposes.

The day selected was bright, with a fair wind. By agreement Harry was
selected as the skipper, as he knew every part of the boat. It devolved
on him to take command for the day, but he would not consent to be the
permanent captain, as he thought that a duty which devolved on the
others as well.

Angel was invited, you may be sure, and he enjoyed the idea of a sail
when he recollected, as was no doubt the case, his former trip. There
was evidence of the remembrance in the animal, when they saw him at the
boat, on more than one occasion, swinging back and forth on the rigging.

The Professor was in his element in the boat. It was a glorious journey
for him, and the boys knew it was appreciated on his part. The wind was
blowing from the west, so the sails were tacked and an easy sail made
for the mouth of the Cataract.

Outside the sea was rolling, but not disagreeably so; but a much
stronger breeze sprang up toward midday, and before two o'clock it was
very brisk. The cliffs were rounded, and as the wind had not changed
quarters, the sails were set for a southern course. This brought them
around the bay and toward the headland to the east of the mouth of South
River.

That region had always possessed a fascination for George and an
attraction for the Professor as well. George, particularly, was anxious
to penetrate the river, and sail up to the falls, but Harry's more
practical views prevailed. "If we want to explore the river we can do it
any day with a wagon, or on foot; but while we have the ship out, why
not take a sail down the coast toward the mountains?"

The Professor concurred in this as the most liable to give them the best
results, as they were out for the purpose of making tests of the craft
on the open sea.

After sailing for an hour along the coast to the south, the shore line
turned to a southwesterly direction, and the mountain range was now
clearly perceptible, extending southwest, and along which it appeared
that the coast followed. The wind changed and came from the mountains,
and made progress slow. There was also a decided change in the
temperature, and by four o'clock it was impossible to follow the coast
except by constant tacking.

The boat was turned to the north, and with the strong wind, which had
now perceptibly increased, began to make good time. As evening
approached, the wind increased, until it blew with considerable
violence, every minute being more boisterous, and the Professor
suggested that the jib be taken down, which was done; but the increasing
gale, and the terrible strain on the mast and sail, made the boys look
inquiringly at the Professor, for a word of warning.

He sat there grimly during the raging storm, and with the halliards
gradually let down the mainsail when the tempest had reached such a
point that it appeared to sweep everything from the boat.

Where was Angel during all this uproar? Forward in the housed portion of
the boat, curled up in a corner, and apparently unconscious, the little
creature did not seem at all perturbed.

"Don't you think he is seasick?"

"It is not likely. Seasickness is akin, you know, to that dizzy feeling
some people have when at a height. The natural instincts of the animal
prevent him from having any feeling of discomfort at a height. The trees
are their homes, and for that reason they can swing from branch to
branch and sway back and forth in the loftiest trees without an
uncomfortable feeling."

The heavy blow continued until they had reached the cliffs, when it
abated somewhat, and the boys anxiously inquired whether it would be
safe to make the entrance to the river during the gale.

"We are out for the purpose of testing the boat. To make an attempt to
round the cliff and steer it into the mouth of the river in this wind
will be the best test of its maneuvering ability."

As stated, the wind was now blowing from the southwest, and they were
northeast of the mouth of the stream they wished to enter. They stood
out to sea in order to make a starboard tack, and it was a gratification
to see the magnificent manner in which the vessel responded, and before
six o'clock they found themselves sailing up the river, and safely
landed at the boathouse.

An examination showed that the crossbeam supporting the mainmast was
split from end to end, and only the roof structure held it in place.
Thus the trip had a warning lesson for them, and Harry was not slow to
take advantage of it and install a larger crosspiece.

George had entirely forgotten the incident of the calcareous slab which
had on it the tracings of the cave, and which had been the means of
giving the Professor the first hint that they were in a pirate's cave.

The first thing in the morning he went over to the laboratory, and
called attention to the slab. "Here it is," said the Professor. "You
will note that the light shows some characters which can readily be made
out, and at the corner here, where a portion has been chipped away, it
has the appearance of something else besides calcium."

"Why, it looks like wood."

"That is what it is. I should not have noticed the wood if the peculiar
lettering had not shown up through the coating."

"What are the letters, and do you know what they stand for?"

"We had better not pass judgment on that until we have removed all the
calcium."

At this moment Harry came in to view the slab. It was the slab he had
carelessly picked up in the cave, and therefore it had a great
fascination for him. The calcium was carefully chipped off, and it was
found to be a piece of oak board, with a smooth cut-off end, parallel
sides, nine inches wide, nearly two inches thick, and about eleven
inches long, the opposite end having the appearance of being broken. The
only letters which could be made out were "HI," and a portion of another
letter which could not be determined.

[Illustration: _Fig. 14. THE SLAB FOUND IN THE CAVE_]

"What do you think the letters were intended to indicate?"

"They might be the name of a ship, or some sign. I do not think it was
part of a ship. I tried to find something in the cave, on the day I went
in while you went after the team, which would afford some clue, but so
far nothing confirms me in any view which I may have."

"Isn't it curious that these letters should show through only after the
slab was exposed to the light?"

"Why is that any more curious than photography is?"

"Because in photography something is put on the glass or the sheet that
the negatives are made of, and it turns and makes a mark under certain
conditions."

"Well, here is something put on this slab that turns also. Photography
is a wonderful thing. Dr. Draper, the first great photographer, and who
was also a scientist, says that every wall, or other object, which you
stand before, has your photograph imprinted on it. The only question is
to find some chemical which will develop the picture."

"What is meant by developing the picture?"

"You remember some time ago we talked about reagents, and the properties
of certain chemicals to act on others, and in doing so, to make a
change. Sometimes the change is a complete one, and makes a new product;
in other cases the result is a complete change of color. Now, in
photography, if a certain chemical is placed on a glass or a film, and
the film is exposed, the light and dark portions of the object show on
the film. The sunlight, or the actinic rays in the sunlight, affect the
chemical material so that when the fixing chemical is applied it
prevents a change in the condition of the chemical."

"What do you mean by the actinic ray?"

"All light is vibration; the greatest motions which are perceptible to
the eye, being known as violet. Now there are still more rapid
vibrations than are put forth to make the violet rays, which are called
the actinic rays, and are the ones which affect the chemicals so
acutely."

"Is it then possible to photograph with a light that is not perceptible
to the eye?"

"You have heard of the x-rays, no doubt; they are the actinic or ultra
violet, which are above the visible light. These light vibrations are of
such a character that they penetrate many substances. A curious effect
of this was shown some time ago when a photograph was taken of the side
of a vessel which had several coats of paint over the old name, and the
photograph showed not only the new name, but also the old one beneath."

The time had now arrived when they must make preparations for the
proposed voyage of discovery around the island. It was a momentous time
for them. The boys could not help but look with longing eyes to the
cave. Before they went it was felt something more should be learned
about its mysteries.

The Professor was not at all backward in encouraging this feeling.

"Wouldn't it be a good thing to take such things out of the cave as we
can make use of here, and during our trip?" said Harry.

"What things do you think we could utilize?"

"Probably the guns; and then they have some cooking utensils."

"And why," suggested George, laughingly, "couldn't we take some of the
money along?"

"That would be a comfortable feeling to have plenty of money in our
pockets. Very well, we'll take this afternoon for the trip."

An early start was made, the lamps carefully trimmed and the guns,
together with the bolos, collected. It was a short walk to the opening,
and Angel, although not invited, accompanied the party.

Together they descended, and soon reached the scene of the conflict at
the large recess to the left of the entrance. The Professor, after
reviewing the scene, suggested that the bones should be carefully
gathered together and deposited at a place where they could be buried.

[Illustration: _Portugese Coin, 1700. Spanish Pistole Peruvian Dollar._]

[Illustration: _Fig. 15. Old Coins found in Cave._]

"We do not want them here as evidences of the strife."

After all had been gathered and carried to the spot selected, the first
task was to gather the treasure found in the chests. And here a sight
met their eyes which staggered them. One of the chests which Harry first
found contained not only an immense quantity of gold coin, of Spanish
and other mintages, but curious other pieces, all ancient, as shown by
the inscriptions, and long yellow bars, the last of which attracted
George's attention.

"What are these bars?"

"They are gold bullion, made by melting up various articles, and
probably the coin itself, so as to make it convenient for
transportation."

"My! how heavy they are! and look at the number!"

When all had been assorted the Professor suggested that as they had
plenty of copper utensils, the latter might be used as receptacles for
the gold. The other chest contained but little coin, but here the
interest was not less pronounced than in the other chest, because the
vessels found were not only of beautiful, but many of curious, design.
Some were of silver, as well, and the boys knew that those would be
serviceable for their table, and at their suggestion all such were laid
aside to be removed to the Cataract.

The kitchen utensils afforded a more varied collection than had been
anticipated. Six of the larger copper vessels were required to hold the
money, jewelry and other articles taken from the two decayed chests, and
there were still remaining at least a dozen more smaller jars and pots,
some with handles, which would be exceedingly useful in their kitchen.

All these were carefully put aside, and the smaller silver articles
deposited in them. And now the guns! Seven skeletons were found, two of
which had been removed to the Cataract by the Professor. After all the
guns had been collected, twelve were counted.

"I suppose each fellow had two of them," was Harry's conclusion.

"If you will go over into the chamber to the east you will find a
sufficient number to assure you that they were not lacking firearms."

The boys now understood. He had told them on the second day's
exploration that he did not find anything new, but only something more.
Why not go and see it now. But they were restrained. A dozen guns were
certainly enough. These were also set aside, and it was then agreed to
place the vessels containing the treasure in a secluded nook, in the
extreme corner of the large recess. Samples of the clothing, some of the
knives or daggers, as well as the little trinkets, found near each of
the bodies, were deposited in the receptacles that had been selected for
removal.

All this accumulation of material was more than they had bargained for
when they left the Cataract, so that the failure to bring the team was
keenly felt. However, it was the work of an hour, only, to get the team,
and it was a pretty fair load which went from the pirates' haunts to the
home on the river.

George's curiosity could not keep him from taking some of the coins
which he exhibited when they returned, and which they would have ample
leisure to examine.

Harry's thoughts were turned to the firearms. They were certainly of an
antiquated pattern. The first thing was their length. Two of them were
unusually long, fully six and a half feet.

"I wonder why it was they made their guns so long?" he inquired.

"The reason was, probably, that the quality of powder was so bad that
the bullet would get out before all the powder was consumed. All the
ancient pistols were very inefficient, because of the short barrel. Even
down to the time of the American Revolution the guns on board of war
vessels were not capable of throwing shot very far, and the most
effective ones were those with long barrels."

"In what respect is the powder of to-day more powerful than in olden
times?"

"Particularly in the fact that formulas have been devised which make a
higher expansion, or give a greater volume of gas. The other feature of
value is, that chemical means have been discovered whereby the moment a
sufficient amount of heat has developed in the powder it instantly
burns--not a slow fusing, like the old powders--but the combustion is
instantaneous. These two factors working together have greatly improved
even the black powders."

After their return the interest in the articles was so great, and the
inventory took so much time, that the disappearance of Angel had been
entirely forgotten. All remembered him going along, and no one had seen
him enter the cave. None of them believed he could be induced to go in,
hence no particular notice was taken of his movements.

An hour after the return, Harry saw Angel coming over the field at the
east of the Cataract, dragging something after him laboriously. All
stood and watched him as he neared home. He had a stick, apparently, but
it seemed to be unusually heavy.

George ran out to assist him, and when he came up he gravely handed to
article to George. It was the barrel of a gun, with part of the
flintlock still attached, but it was rusted almost beyond recognition,
the bore completely filled with dirt, accumulation and rust.

"Where do you suppose the little rascal found this?"

The Professor examined it. "Outside of the cave, undoubtedly. The
curious part about it is, that this weapon is of an entirely different
and more modern pattern than those we have samples of."

Harry took the gun and ran in to where the others were deposited, and
true enough, it was not only shorter, but it had a smaller bore, and
what is more, the outside of the barrel was octagonal, whereas the
barrels of those inside of the cave were all round.

As the Professor predicted, the guns which they recovered were too much
rusted to be of any service, and furthermore, they were made of iron,
very much softer than the steel of which their own guns were
constructed, and it is questionable whether they would be able to
withstand a charge of the comparatively high power powder which had been
made for the modern guns.

As curiosities the weapons were good things to have; otherwise they were
of no value. This was not so with the vessels, which could be and were
utilized in the kitchen and in that capacity were of the highest use.
The table was supplied with articles of the purest silver, and it had a
royal look.



CHAPTER IX

MAKING ELECTRICITY


In order that you may get some sort of idea concerning the condition of
our little colony, at this time, it would be well to give a brief review
of the situation. When they landed on the island the year before, with
nothing but the clothing they wore, the prospect of being delivered was
not a flattering one, as day after day passed by.

Here were two boys, unused to the privations of life, with youth and
vigor, cut off from all the pleasures of manhood, surrounded by dangers,
and day after day having mysteries thrust upon them which only increased
their fears. These things necessarily must have produced an impression
much deeper than would be the case with hardened men.

In the effort to discover, produce and build the various tools, weapons,
and articles of clothing, to hunt food, and in the endeavor to learn
about the condition of the island, and guard themselves against foes
which might be all about them, imposed immense responsibilities.

In their struggles were personified the contests of the human race from
the beginning of the world, in the effort to conquer nature, and to make
it contribute to their necessities.

The Professor knew how such a condition would tend to make active minds
either productive of good, or to fly out in the opposite direction and
cultivate the low and sordid instincts. Occupation, work, the
utilization of the mind, and above all, to direct their energies into
useful channels, had been the Professor's one absorbing aim.

The boys had responded, as all boys will, not for the love of gain or
for power or glory. Our boys had none of these. Other boys do not need
them any more than those on Wonder Island. What they do need is a true
stimulus for work; and when that evening they were gathered together in
the cozy little living room at the Cataract, the Professor who for two
days had been particularly reticent and retired, said:

"Can you imagine the condition of the pirates who gathered all that
hoard in the cave? What do you think their aim was in life?"

"It seems to me," was Harry's reply, "that the only thing they were
after was wealth."

"If what we see in the cave is any indication, the principal thing they
lived for was to kill somebody," was George's conclusion.

The answers made him smile. "You have, I presume, answered the question
in the two sentences. But there is something that you haven't mentioned,
which is at the bottom of it all."

"Yes; wanting to kill to get the money."

"That only states your previous answers in a more concrete way. There is
one word which describes it accurately: Selfishness. When a man inquires
into the secrets of nature; when he tries to turn the knowledge gained
into account, either for money or glory; when he consistently devotes
his days to labor, and his nights to thoughts to find out how he may do
something better, or quicker, or cheaper, it might all be denominated
selfishness, and so it is, in a way. It is a selfishness, however, that
does no injury to a fellow-man. That kind of selfishness is the great
quality which has produced the wonderful things that we see all about
us, and which distinguishes the man from the brute creation."

"But I have read of a great many men who made millions and millions and
who never did any of the things you have just referred to," answered
Harry.

"Then do you think they are any better than the pirates were?"

Notwithstanding the exciting times, food was a necessity, and it had to
be found and prepared. It could not be bought. All the gold in the cave
would not purchase a single meal. More barley had to be ground and the
stock of honey was almost exhausted. Their duties in the shop,
consequent on the haste exhibited to get the boat and weapons ready,
contributed to the low state of supplies.

George announced that there was less than two pounds of the honey left,
and proposed that a trip be taken to the flats, where the Professor had
found the sugar cane. All joined in the journey to the cane field, and
Angel was invited to join, which invitation was accepted by him
gleefully.

The bolos were taken for the purpose of cutting the cane, and on the way
George's inevitable question point was in evidence. "What did people use
for sweetening purposes before cane was discovered?"

"Honey was the principal source of the world's sweets. But cane is not
the only kind of vegetable from which the principle has been extracted.
There are many kinds of reeds which furnish a sweetish substance. Sugar
cane was first made known in eastern Europe by the conquest of Alexander
the Great. Nearchus, one of his admirals, in sailing down the Indus,
found the reed, and it was, previous to that time, known throughout the
greater part of India. He described it as a kind of honey growing in
canes and reeds. From this you may infer that honey was the principal
source of sweets in his time."

"What are the other principal plants or substances that sugar is made
from?"

"Mainly from beet, tubers of various kinds, such as the common dahlias,
and numerous vegetables, from milk, fruit, gum arabic, as well as fish."

"I have heard it said that sugar contains all that is necessary to
sustain life. Is that true?"

"That is a mistaken idea. It will sustain life for quite a time and with
the addition of nitrogenous matter has great fattening properties, but
without that it is not valuable as food."

"What do you mean by nitrogenous matter?"

"Meat, fish, eggs, milk, beans, peas, and the like, all contain a large
amount of nitrogen."

"I remember my arm being burned on one occasion, and mother made a syrup
out of sugar and put it on. In what way was the sugar beneficial?"

"In the first place, sugar is one of the most powerful antiseptics
known. It acts, therefore, as an aid to healing, since it protects the
wound from foreign substances and from poisonous and harmful germs. In
the next place, it is a great preservative for either fruit or flesh."

The cane was cut close to the root, and the top and leaves trimmed off.
Within several hours a full load was thus procured. The boys enjoyed the
pith, and George playfully gave some to Angel. His surprise knew no
bounds. When he knew what the cane was good for, he simply gorged on it.

[Illustration: _Fig. 16. Cane Crusher._]

Harry at once set to work on turning up two rollers from hickory, the
rollers being eight inches in diameter, and eighteen inches long, and
each being provided with a spindle four inches in diameter. One end of
each of the spindles was longer than the other, so pulleys could be
attached, the object being to provide a means whereby they might be
turned by suitable belts from the water wheel. In addition, the top
roller was made so it would yield, and had levers resting on the
spindles, and provided with weights, so the rollers would press out the
juice, whatever the quantity that might be placed between the rollers.

It was really a simple little machine to put up, but it required a day
for both of them. Vessels were now provided for the juice, and when they
were filled, the Professor suggested that a little lime should be put
into the juice, after it had been strained through the ramie cloth.

"What is the object of putting in lime?"

"To precipitate the impurities."

The action of the lime was plainly visible, and after it had been
allowed to settle, the clarified portion was drawn off, and the process
of boiling down was proceeded with. As fast as one of the vessels was
boiled down, more of the cane was crushed, the juice being dipped from
one vessel to the second one, until the entire load was crushed and the
juice boiled down to a thick consistency.

Here was molasses, at any rate a good substitute for honey, and it was
so homelike to get the real article. That night they had molasses candy.
It felt like old times. It was a real candy pulling, and no one enjoyed
it more than Angel. From the moment he had the first taste of the pulp
of the cane, he was the most interested one of the party. But the fun
came the next morning, when George brought out, for his benefit, some of
the taffy which had been set out to harden. The chuckle which he
emitted, when he tried to pry off a piece of the sweet morsel, was too
amusing for words.

When the entire amount of juice had been boiled down and it had readied
the point where it had the appearance of granulating, the fire was
withdrawn, and the whole mass stirred until it was cooled, and the
result was a fine sample of beautiful brown sugar which weighed
forty-three pounds.

Nevertheless food was an important item in their preparations, the
necessities for doing everything in their power to insure the success of
the maritime enterprise. One of the most valuable adjuncts for sailing
is a compass. No attempt had been made to produce the implement, and
when the needs of the expedition were being discussed, Harry was curious
to know the reason why the compass always pointed north and south.

The Professor was very much interested in all electrical phenomena and
replied: "The earth is a huge magnet, and any body which is magnetized
has a north and a south pole. The needle which is also a magnetized body
has, in like manner, a north and a south pole."

"But in what manner does that make the needle point in one way only?"

"Electricity is a very curious thing. While the current unquestionably
moves from one end to the other of a conductor, it also exhibits itself
in the form of rings around the wire. This may not be understood in the
absence of a sketch. For that purpose I make a drawing (Fig. 17) which
shows a conductor (A), through which a current is passing, and this
current is represented by the spiral line (B) which goes around the
conductor."

[Illustration: _Fig. 17. A MAGNET_]

"Well, is magnetism the same as electricity?"

"Both exhibit the same manifestations. Magnetism is nothing more than a
body charged with electricity. The electricity, which appears to travel
around the conductor (A), extends out for some distance from its body,
and produces what is called a magnetic field. This is the case whether
the magnet is a permanent one, like the earth, or whether the conductor
is charged by a dynamo."

"What is the difference between the north and the south pole?"

"There is really no difference. The terms north or south and positive or
negative are mere relative designations, and are distinguished simply by
the movement or direction of the travel of the current. You will
remember when we made the battery, it was shown that the current,
outside of the battery, moved from the positive to the negative pole.
That was merely stating that it moved from the north to the south pole
outside of the earth, and from the south to the north pole inside of the
earth. The current is, therefore, from one magnetic pole to the other."

"What I cannot understand is why the magnetic poles should be at the
north pole and at the south pole."

"The magnetic poles are not at the poles of the rotation of the earth,
but hundreds of miles away, to one side of the poles on which the earth
rotates; but they are near enough to the real poles, for all purposes,
so that the needle points to what we call the north pole of the earth.
Any magnetized body must have these two opposite poles. If it is a body,
like a bar of iron, one end is called north and the other south. Look at
this other sketch (Fig. 18) and you will see how the currents flow in
the two magnets. In this case the large body (E) represents the earth
and the small body (M) the magnet. Now notice that the current going
around the large body moves to the right, or to the north pole, whereas
the current in the small magnet (M) flows in the opposite direction."

[Illustration: _Fig. 18. MAGNETIC INDUCTION_]

"And does the current flowing around the bars, as you have shown, make
the small magnet turn around so that it is always parallel with the
large magnet, and make the north pole of one magnet at the same end with
the south pole of the other magnet?"

"Yes; to make it still clearer, I make two more drawings (Figs. 19 and
19a), in which two sets of magnets are shown. In the first of these
pairs of magnets (Fig. 19), the two north poles approach each other, and
the two south poles are opposite each other. The currents, if you will
notice, at the north poles move toward each other, and at the south
poles move away from each other. They are, therefore, acting against
each other, and the result will be that the magnets will move away from
each other. If, now, one of the magnets is turned so the poles of one
magnet approach the opposite poles of the other magnet, as shown in the
second view (Fig. 19a), they will attract each other, because the
current is permitted to flow through the two magnets in the same
direction without one conflicting with the other."

[Illustration: _Fig. 19. Fig. 19a. THE TWO MAGNETS_]

"Is that the reason it is stated that likes repel and unlikes attract?"

"Yes."

In order to take advantage of this knowledge, knowing that the earth is
a great permanent magnet, it was necessary to make a small magnet, and
so suspend it that it would turn freely, and the magnetic north and
south could then be determined.

To do this the battery which had been previously made was brought into
play. George took a hand in the work, and while they were preparing the
metal for the little bar, said: "You spoke about a permanent magnet.
What other kinds of magnets are there?"

"Magnets are permanent or temporary. A permanent magnet is one in which
the electricity resides, or remains, as it does in the earth. A
temporary magnet is one which has magnetism imparted to it only while a
current of electricity is passing around it."

"How is the current made to pass around it?"

"By wrapping an insulated wire around it, and sending a current through
the wire. When that is done the same thing is done to the bar as the bar
of the permanent magnet exhibits. As soon, however, as the current
through the wire ceases, the bar is again demagnetized. That is, it
ceases to be a magnet."

"We have the small bars ready, Professor. What is the next step?"

"It must be hardened so as to make it a flinty steel. The harder the
better, so that it will preserve the magnetism imparted to it."

"Is that the better way to make the temporary magnet?"

"No; in that case the bar should be of the softest iron. Remember,
therefore, that for a permanent magnet, use the hardest steel, and for a
temporary one, the softest iron."

"Then as we want to make a permanent magnet, must we harden both of the
bars?"

"No; for our uses, one must be left soft, because on that we shall want
to wind some insulated wire to make a temporary magnet."

The small amount of wire which was on hand was then coated with a thin
layer of the ramie fiber, which was carefully wrapped around, so that
the different layers of wire could not touch each other. When this was
completed, a spool was constructed, which fitted over the little bar or
rod, because they were rounded off, and one end of the soft iron rod
extended out beyond the spool.

The opposite ends of the winding were then brought out and attached to
the terminal wires of the battery. A test showed that the magnet thus
made would readily pick up pieces of iron or steel. The Professor then
took the hardened steel rod, through which a small hole had been bored,
midway between its ends, and laying it down on the table, the projecting
end of the temporary magnet which projected from the spool was put into
contact with the hard steel rod, and slowly drawn along to the end. The
soft bar magnet was then raised up and again repeated, as shown in the
drawing (Fig. 20), where the dotted line (A) represents the movement of
the end of the temporary magnet.

[Illustration: _Fig. 20. MAKING A PERMANENT MAGNET_]

This was repeated over and over a great many times, and finally the hard
steel bar was found to have a charge of magnetism, and for the purpose
of providing a means for holding the magnetism, a C-shaped piece of iron
was put on the bar, as shown in the detached figure.

"Is that the reason," asked Harry, "why a small piece of metal is always
put across the ends of a horseshoe magnet when it is not in use?"

"Yes."



CHAPTER X

STARTING ON THE VOYAGE TO THE WEST


"If I remember correctly, you stated some time ago, Professor, that the
barometer indicated the pressure of the atmosphere, and in that way it
was useful in letting us know what the weather would be. Before we sail,
would it not be well to make one of them? If we had possession of one of
the articles, we might not have been caught in the storm the first time
we took out No. 3."

"That is a good suggestion. I intended to propose that, because with the
barometer and the compass we shall be equipped with two of the most
useful instruments needed."

"I cannot comprehend how the air pressure has anything to do with the
weather. Is the air pressure really greater at one time than at
another?"

"Heated air ascends, does it not?"

"Yes; I can understand that."

"As it ascends it is, therefore, lighter at that point than normally. On
the other hand, moist air is heavier than dry air. These two conditions
would be indicated by the barometric column, would they not?"

"I presume they would; but when the air is moisture laden we don't need
a barometer to tell it is going to rain. We know it and feel it. What I
particularly wanted to know was how the barometer by its actions would
indicate it ahead for any length of time."

"The barometer does not indicate with any degree of accuracy on land;
but on sea it has a much better application. The instrument shows the
present pressure of the atmosphere, and its variations correspond to
atmospherical changes which have already taken place, the effects of
which may follow their cause at a greater or less interval."

"Then how could it be ascertained from the instrument when there would
be a storm or rain?"

"After a continuance of dry weather, if the barometer begins to fall
slowly and steadily, rain will certainly ensue; but if the fine weather
has been of long duration, and the mercury may fall for two or three
days before any perceptible change takes place; the more time elapses
before the rain comes, the longer the wet weather is likely to last."

"Then what indicates dry weather?"

"If, after a great deal of wet weather, with the barometer below its
mean height, the mercury begins to rise steadily and slowly, fine
weather will come, though two or three wet days may first elapse; and
the fine weather will be more permanent in proportion to the length of
time that passes before the perceptible change takes place."

"Is this the case at all times of the year?"

"The seasons affect the barometer, it is true. A sudden fall of the
barometer in the autumn or in the spring indicates wind; in the summer
or in hot weather it prognosticates a thunderstorm; in winter, after
frost, a sudden fall of the mercury shows a change of wind or a thaw
with rain; but in a continued frost a rise of mercury indicates
approaching snow."

"It seems, then, that a man must be pretty well versed in the weather to
be able to read the signs."

"That is a correct observation. The instrument in the hands of one who
has had experience with its use is absolutely necessary; it is not a
very satisfying device for those who do not take the time or trouble to
read all the signs, and note all the indications."

As detailed in a preceding chapter, the hardened steel rod for the
compass was brought out for the purpose of securing it in a little case,
so that it might be utilized to give them the true north.

It was a difficult task to find a means of suspending it, for the reason
that they had no tools which would make fine and carefully pivoted
balances, but eventually this was done, and they were gratified to see
the little rod or bar swing around and point north and south.

The work of arranging suitable closets for the various provisions and
providing a miniature kitchen was the next thing in order. This occupied
several days. Instead of taking the bedding in their house, it was
decided that new mattresses should be made up from the barley, of which
there was quite a quantity on hand.

One of the receptacles taken from the cave was a copper jar, which held
five gallons of water. A top was made for this which could be sealed up,
to hold a reserve supply of water. In addition two other vessels were
also provided for the regular supply, and also fitted with covers, so
that they had about ten gallons, an amount which was considered
sufficient.

The matter of fuel was a more difficult one to solve, unless they
intended to prepare most of the food before starting; but George
insisted that the small stove should be put aboard, and about fifty
pounds of the coal stowed away.

"How long do you think we should provision for?" was George's inquiry,
as they were carrying the various things aboard.

Harry had no ideas on the subject, but the Professor ventured the
opinion that at least two weeks' supply should be arranged for.

This conclusion rather startled the boys, who had not expected more than
a few days' trip, and when they questioned him about his reasons for
making the statement, he said: "Did you ever hear of the old lady who
attended a special meeting of prayer for rain? She came with an
umbrella, and the people laughed and chided her. The minister reproved
them, saying: 'She, at least, has faith, which you have not.' We are
going for two purposes: one is to learn something about the island we
are on, and the other to rescue our companions if they can be found. We
couldn't rescue them and let them starve."

Those words impressed them as nothing theretofore had, that the
Professor believed they were really going to find their former
shipmates, and that they would have stirring times before them.

Nothing so stimulates the actions of men, or boys, as the prospect of
adventure. Their trip had a double meaning, and it is not venturing too
much to say that their feelings were most tense during the entire period
in which they were engaged at the task of fitting out the little ship.

At last the day was set for the departure. The cattle could take care of
themselves. A tablet was prepared to be put up on their dwelling,
stating who were the owners of the habitation, their present
destination, and briefly relating the knowledge they possessed of the
inhabitants of the island, a statement of the direction they had taken,
and the kind of boat to which they trusted their destiny, and when they
expected to return.

A copy of this was then carried to the pole on Observation Hill, and
nailed to the mast, to replace the small tablet which had hitherto
filled that place. They were to launch the boat for the start on the
morrow.

That night a storm blew up from the west, as most of the winds had
previously blown from that quarter during the past month. The storm was
severe during the entire night, and abated somewhat in the forenoon, but
it again increased in fury before noon and continued with more or less
vigor all that day and during the night.

"I am afraid this storm will prevent us from starting for several days,
on account of its widespread character. The sea for hundreds of miles
has been subject to this monsoon, and we would have a very rough time
until the sea quiets down."

The delay was a bitter thing for the boys. Expectation had run high.
Anticipation doesn't mildly or easily brook waiting. They did not know
what to do, or how to pass the time in the interim. It was such a new
and trying condition for them.

The Professor noticed how they chafed under the restraint, but
apparently took no heed of it. However, he encouraged them in every
effort they made to divert themselves and to occupy their minds during
the waiting period.

During one of these spells which come on all more or less during such
trying hours, George could not hold in any longer, but broke out
impatiently: "What is the use of waiting any longer? The storm may keep
up for a week."

"Then do you think we had better venture a start under these
conditions?"

George thought a while. He appreciated the risk. Harry, too, was anxious
and nervous, and expressed a willingness to take the risk.

"Let me put another side to the question," said the Professor. "We are
perfectly safe here. You take no risks by remaining. You have in the
cave treasure that will make you millionaires. You cannot afford to take
any risks. If we knew something of the conditions on the island, and had
a certain knowledge that our comrades were in danger, the considerations
I have named should not deter us from starting. But with all these
things in the dark, and with the monsoons likely to break out again at
any time, the question is whether we can afford to risk the safety of
the enterprise because of impatience at delay."

"Yes," answered Harry. "I have thought of these things, and I feel that
the Professor's advice should be followed."

The boys were particularly surprised that he should refer to the money
in the cave as a reason why they should consider their actions in the
matter. It was so unlike him to refer to any sordid considerations as a
reason for not performing a great duty.

"I would also remind you that one of the greatest boons ever given to
the great investigators of the world came through delays. Time is a
wonderful reasoner. It is also a great modifier of events. Darwin was
prevented for twenty years in promulgating his great thesis; some of the
most marvelous inventions took years to bring out and develop into such
a state as to make them acceptable to the world. Delays, patiently
borne, make strong men. The impetuous think they represent wasted
opportunities. Davy Crockett enunciated one of the greatest principles
of human action when he said, 'Be sure you are right, then go ahead.' It
was only another way of advising against recklessness or impatience in
any enterprise."

Thus three days passed, and not without misgivings, the signal was given
for the start. Angel accompanied them, and with a new flag which the
days of leisure had given them an opportunity to prepare, the little
craft sailed down the waters of Cataract, in a shining sun, bound for a
haven which might mean rest, or to a shore which might offer no welcome
to them. The wind was coming mildly from the north, and when they had
cleared the shore line and were beyond the influence of the swells,
their course was directed to the west. Several miles beyond was a point
which projected out to sea; they could see this plainly from Observation
Hill, and during the last long trip inland they reached the sea beyond
this cape.

The shore line beyond was absolutely unknown to them, but it extended to
the west as far as they could see, and when night set in the faint mist
prevented them from judging how much farther it ran in that direction.

Without proper instruments at sea, distance is always a difficult matter
to judge, and the boys were constantly venturing guesses as to the
distance traveled. The start was made shortly after nine o'clock, and it
was now past six in the evening.

"How far do you think we have gone during the day?" was George's
question.

The Professor made a mental calculation before replying. "If we have
traveled at the same speed during the entire course that we made during
the first three miles to the cape, we have gone about thirty miles."

"Do you know it is three miles to the cape?"

"Yes, it is approximately that distance. I measured it by triangulation
some time ago, using our house and Observation Hill as the base line."

The boys had neglected to take this precaution.

"What was your object in doing that?"

"So that we might have some means to observe the speed our boat could
make. If we knew the speed of the wind, we might be able to calculate
our distance."

"But the wind has been coming from the north and we are sailing due
west. Would not the difference in the speed of the wind make a
difference in the speed of the boat?"

"It was for that reason I stated if our rate of travel was the same we
would have made that distance. The wind has been variable at different
points along the coast, so that our average may have been four miles per
hour."

"At what speed has the wind been during the day; I mean the average
speed?"

"Less than eight miles an hour?"

"If the wind had been coming from the east we could have made much
better time, and we might then have been near the mouth of the West
River," was Harry's conclusion.

"Why do you think we should have made better time?" asked the Professor.

"Because we should then have been going with the wind."

"You are entirely wrong in your assumption. Sailing ships travel faster
when tacking than when sailing with the wind."

The boys looked at the Professor in astonishment.

"It does not seem possible," replied George, "that any movement of the
wind pushing sidewise could be more effective than a pressure straight
ahead. Can you explain the reason for the statement?"

"When the wind blows straight against a sail, certain eddies are
produced which cause a convolute stream around its edges. These currents
are counter to the forward movement of the vessel. Assuming that this
normal pressure of the wind is 1,000 pounds, it is estimated that fully
half is lost in effectiveness. On the other hand, if the ship is moving
forward at right angles to the direction of the wind, and the sail is
set at forty-five degrees, that is what is called a tack; while it has
only about six-sevenths the surface that it had when going with the
wind, the sail is constantly going into new wind and, therefore, the
pressure is a constant one and most efficiently applied to the surface."

"Do you mean by this that if I hold up a sail so that the wind blows
flat against it, the pressure will not be as great as if I held it at an
angle?"

[Illustration: _Fig. 21. Fig. 22. ILLUSTRATING WIND PRESSURE_]

"No; I had reference to a moving object. I can better explain the
phenomenon by illustrating the two conditions: In the drawing (Fig. 21),
let A represent a sail with 100 square feet of surface. The darts (1)
represent the wind blowing dead against it. This is called the normal
position. You will see the darts representing the direction of the
movement of the wind. Now look at the next sketch (Fig. 22). Here the
sail (B) is put at an angle of forty-five degrees from the direction of
the wind. The sail is still the same size vertically, but it is somewhat
smaller horizontally across the line (C), this diminution in size being
about one-seventh of the entire area. The darts (D) in both cases
represent the movement of the boat, and the darts (2) in the last sketch
show the wind striking the sail at an angle."

"In the first sketch the darts (1) strike the sail normally, as you say,
in what way do the darts (2) in the next figure strike the sail?"

"At an angle of incidence. If you will notice the behavior of the wind
in the first view it will be seen that the wind curves around the edges
of the sail, and strikes against the back of it, and thus produces the
retarding effect I referred to. On the other hand, by examining the
second sketch, the darts (2) plainly show their course across the sail
diverted from their straight source, and behind the bulging sail the air
does not press against the sail, but tries to continue in a straight
line. As a result a partial vacuum is formed along the region designated
by E, and this produces a most effective pull, since the sail constantly
tries to move forward and fill this vacuum. Is this made clear to you?"

"I can plainly see now what the action of the air is, but does the air
push just as hard against each square foot when it is at an angle as
when it is blowing against it straight?"

"That is a good observation, and one that might ordinarily be
overlooked. No, it does not, but the difference can be readily
calculated."

"Then supposing the sail to be 10 feet square, and the wind is blowing
against it straight, as in the first sketch, at the rate of twenty miles
an hour; what pressure would there be against the entire sail?"

"At that speed of wind the pressure on each square foot of surface is 2
pounds, and this multiplied by 100 equals 200 pounds."

"When it is at forty-five degrees, what is the pressure on each square
foot?"

"This is determined in the following manner: Square the speed of the
wind, which means multiplying 20 by 20, and this produces the square,
400. In mathematics, as in many of the sciences, a constant is employed.
A constant is a figure which never varies. In this case the constant is
designated by the decimal .005. That means 5/1000th, or reduced to its
lowest denomination, 1/200th. If, now, we divide 400 by 1/200, the
result will be 2 pounds. This figure thus represents the pressure of air
on each square foot of surface, which, multiplied by the sail area, 100
square feet, makes 200 pounds."

"If that is the push when it is normal, what will it be at 45 degrees?"

"Each angle of incidence has its own figure, or coefficient, or for your
better understanding, value, and the value at 45 degrees is .666. So
that by multiplying 200 by this value, we get a total pressure of 133.2
pounds."

"These figures are used a great deal in flying machines; are they not?"

"Yes; and that is a subject which we might pursue, but there are some
things right ahead that may for the present interest us more."

Through the haze which had now settled down, a faint outline of land was
made out in the distance. The course was altered to the northeast, and
after a quarter-hour sail, land was again espied ahead, so that to avoid
the shore the course was taken due north. This was evidence that the
land projected northwardly, and the Professor suggested that the effort
should be made to chart as accurately as possible the shore line. This
could be done mentally.

"I had forgotten to take any note," said Harry. "What is the proper
thing to observe in making these calculations?"

"Two things must always be uppermost in the mind of the explorer on the
sea: First the time, and second the speed. Time can always be accurately
determined, but the question of speed can come by experience only. A
good sailor can very accurately determine speed by an examination of the
passing water, where the sea is comparatively calm. I have known where
the distances have been thus estimated within a hundred feet in each
mile in a ten-mile course, and where the speeds were varied along the
route. Then, a good observer must have the gift of direction. If he has
sailed one hour at a certain speed in a given direction his mental chart
may be of the greatest service to him. In our case it would be
invaluable. It is a quality well worth our effort to acquire."



CHAPTER XI

A TERRIBLE VOYAGE AND THE SHIPWRECK


The shadows of night were now upon them. How vividly it recalled to
their minds the horrors of the five days and nights during which they
were tossed about in the little lifeboat a year before. Then they were
helpless, and now strong. At that time everything was dark and gloomy,
without a ray of hope. Contrast the situation at this time.

What a gratification it must have been to look back during the past
twelve months and mentally calculate what they had accomplished. They
had delved in many of the hidden mysteries of nature and learned the
secrets. Such knowledge had been put to use. They had discovered many
things that gave them pleasure, but in doing so found others that
startled and grieved them. Things inexplainable and impossible to fathom
had crossed their paths on almost every side.

But they were now doing the work of men. The Professor knew how they had
developed, and grown brave and strong. He knew it better than the boys
could realize themselves. What a source of pleasure it must have been to
the kindly faced, gray-haired Professor, as he looked at his charges in
admiration and love. Could anything be more inspiring than the
contemplation of the work he had done?

And now the inevitable charting board was brought out, and the plan
adopted which would enable them to trace the coast line. It was
explained that all sailing was by the points of the compass, and for
this purpose the compass was made to correspond with the regulation
instrument. This is shown in Fig. 23.

[Illustration: _Fig. 23. MARINER'S COMPASS_]

The four cardinal points are north, south, east and west. Exactly midway
between each of the four points are the divisions designated northeast,
southeast, southwest and northwest. Then, again, intermediate, the last
divisions and the cardinal points are other markings which show that the
angles are nearer one of the cardinal points than the other, so that a
course may be marked off, by the compass, which, if followed for a
certain time, and the speed of that period determined, can be traced and
thus marked out on paper so that the outline of the coast can thereby be
laid out.

[Illustration: _The Northern Shore OF WONDER ISLAND. Chart showing Voyage
in "No. 3." Fig. 24._]

The Professor had the charting board before him. "I have marked our
starting point, which is designated as A. It will be remembered that we
marked a course due west, passing the headland three miles from Cataract
River. This is line 1. When we saw the land ahead of us last night, we
changed our course by the compass to northwest, thus making a new line
of travel, which you see is designated as 2. B was the point where the
turn was made."

[Illustration: _Fig. 25. THE CHARTING BOARD_]

"But in what manner did you know how to transfer it to the board?"

"The board has two lines crossing each other at right angles to
correspond with the two lines on the compass. The compass was put on the
middle of the board, and the upper board turned so that the needle was
on a line with the N----S line."

The boys now noticed for the first time that there were two boards, one
above the other, and that the lower one was a little larger, and was
attached to the boat. "Why do you have the lower board attached to the
boat and larger than the upper one?"

"The lower board has on it a section of the compass, and the upper end a
pointer, as you notice, and the line T represents the boat's direction,
so that when the compass was placed on the upper board, the latter was
turned so that it corresponded with the points of the compass. The
little pointer then accurately pointed to northwest, on the lower board,
and by this means the changing of the upper board, so as to keep it due
east and west at all times, will enable us to keep on our course."

It was a long and weary night. One of them slept while the others were
on duty. The boys knew the time on shipboard, where the day begins at
midnight, and is divided into watches of four hours each, thus making
three watches for the night and three for the day. A bell is struck
every half hour, so that each watch is noted by the eight strokes of the
bell. What is called the dog-watches occur between 4 and 8 P.M., this
period being divided in the first dog-watch between 4 and 6, and the
second dog-watch between 6 and 8.

"Why should such peculiar times be taken, or the periods be divided up
in that way?"

"For the very reason that we discussed the arranging of our time of
watch last night; namely, so that one person would not have the same
watch every night. It was agreed by us that one should have three hours'
uninterrupted sleep, while the others were on duty, so that each would
in turn get three hours' work. Our arrangements are somewhat different
from shipboard time, on account of our number, but the principle is the
same."

During the night the wind changed to the north, so that progress was
slow and required considerable tacking, and when the Professor came on
duty he found the course still to the north, and on questioning Harry,
found that the wind had been rather regular during his watch. Within a
half hour of the time he took charge the western shore faded away, and
the course was directed to NWW, in which direction they continued until
well along in the forenoon. Then, as the land receded again, another
tack was made, WbS, which means West by South.

The winds, however, were perverse during the second day. After a calm
the wind veered to the west, and when in the afternoon the course was
changed to SSW they had to sail close to the wind, and made slow
progress.

Let us see what they found on the day's journey along the northern point
which they rounded the second day of the journey. Cliffs, like their
own, were distinctly visible in the evening and during the morning of
the second day, but when morning broke on the third day they saw a
beautiful shore line, and beyond the mountain range which was seen by
them on their land trip to West River. It was now certain that the mouth
of that river had been passed during the night and all regretted this.

During the whole of the third day they were forced to sail in the teeth
of the wind, which necessitated frequent tacking. Not a sign of human
habitation was seen on this day, but during the night, when the boys
were on duty, they declared that they had seen lights to the south. The
interest was most intense. Were they really rounding the island?

The course for the opening morning of the fourth day was SWbW, and early
in the day they were not more than a mile from the shore, and then the
shore gradually receded, but the course was not changed. The wind began
to blow with greater force, and came from the southwest. As night
approached it increased, but they continued tacking, hoping that they
might reach the western extremity, and thus be able to run to the east
before the wind.

Before eight o'clock lights were distinctly visible. They had reached
the vicinity of human habitations. The boys were too excited to think of
the watches which had thus far been observed. Aside from that, the wind
had now reached such a violent stage that it was impossible to make any
headway against it.

A consultation was had. "We must either turn to the north or go to
shore. I fear this sudden change in the direction of the wind," was the
Professor's opinion of the situation. It would not be wise to risk the
shore. All knew that and sadly they turned the craft to the north. It
was well that they did so. Every moment, it seemed, some new impetus
would be given the wind. It howled on every side of them; the waves
drifted across the little ship, until everything was dripping with
moisture, and the only dry spot was within the little housed enclosure
which had been well protected on the open rear side, thanks to the
watchful suggestions of the Professor.

To add to their discomfort of mind, the land was not in sight. There was
nothing to steer by except the compass and the chart which had been laid
out. They were now going north over the course that had been traversed
for the past two days--the west coast of the island.

It was a long, long night. No one slept, because fear and anxiety was
ever with them. They remembered now with vividness the days spent on the
ocean when they were wrecked. It was a terrible succession of hours,
with the wind and the lightning and the rain one continuous orgy. The
Professor sat at the tiller. The sails had been taken down long before.
The impact of the driving storm against the housed structure was
sufficient to drive it forward, so that the vessel could be guided.

It seemed that every blow against the boat would wrench it to atoms, but
if any part had given way it was not apparent. Harry, who sat nearest
the housed structure, suddenly sprang up, and pointing down, cried out:
"It is leaking; look how it boils!" It was forethought on the part of
the Professor to put in a supply of the oakum used for caulking
purposes. Harry sprang for it, and George grasped the bailing pan. After
a struggle a sufficient amount was driven into interstices to keep out
at least a portion of the seepage. This knowledge was most oppressive.
When a boat of this kind once springs a leak, due to a severe wrench of
the shell itself, it is a difficult matter to remedy it, without
structurally strengthening it.

Morning was now appearing, and still no land appeared in sight. More
leaks appeared, and the boys were now constantly bailing and repairing.
The Professor had held the tiller for more than six hours, but he did
not appear to be exhausted. At every attempt of the boys to relieve him,
he only said that they had more important work in bailing and caulking.

He finally changed the course due east, and it was more by luck than
exact calculation that they made out the northern end of the island
which was passed the first night out. In one night they had traveled a
distance coming back that required two days and nights to traverse in
the other direction. As it was they were headed for the cliffs at the
point of land, and it must be avoided.

Harry saw the danger, and went back to consult the Professor. He had the
tiller firmly in his grasp, and his body bent over it to keep it steady;
but when Harry reached him, and touched him, there was no response.
Almost frantic, he cried to George: "Come here, quickly; something is
the matter!"

George was there in an instant, and caught up the Professor, while Harry
grasped the tiller, as it was released, and turned it to starboard. The
little boat responded, but Harry knew that if turned too far, the wind
might catch it on the beam and crush it to atoms.

The Professor had fainted, and when George finally revived him, he
looked about, and seeing Harry at the tiller, told him that he must turn
to the left to avoid the cliffs, and when he was advised of what had
bean done, he grasped Harry's hand, and commended him for the knowledge
and foresight which had been exhibited in that trying moment.

The cliffs were ahead and to the right. The crucial time must come
within the next half hour. The point must not only be cleared, but they
must pass it at a distance beyond the influence of the powerful swells
and waves, which are always present at points situated like this. The
storm was from the west, and the promontory pointed to the north. Under
the circumstances, the sea at the end of the land was a raging
maelstrom, and the counter influence of the raging waves, beyond the
point, offered as great a danger as at its extremity.

And now the leaks appeared at every side. Despair almost overtook Harry,
and he moved from one point to the next with the oakum and the caulking
tool. The Professor had insisted on again taking the helm. He had been
refreshed by the few moments' relaxation. Slowly he moved over to the
tiller. Would he ever make it? The boys stopped their work, fascinated
with the nerve-racking intensity of it. They knew the point had been
passed. The Professor smiled, and held up his hand as a signal, and the
boys rushed to him and actually cried, as he put his arms about them.

It must not be imagined that they were out of their peril now. Nearly a
foot of water was in the bottom. The storm was, in a measure, blanketed
by the cliffs, and there was now no alternative but to reach the shore.
It was fortunate that they were on the lee side of the land, but even
there the waves rolled up on the shore, and the Professor knew that any
landing which might be made would be hazardous in the extreme.

The vessel was approaching a shelving beach. Fortunately, from what
could be distinguished of its character, it was not a broken or rocky
shore.

"Boys, can you put up the mainsail?" The Professor's voice had a
wonderful ring to it, for one so nearly exhausted. Without waiting to
question they sprang to the halliards and drew it up, while the boat in
the meantime was turned to port to ease the operation.

The boys looked on in wonder as the tiller was turned and, when the boat
had gained headway, was pointed to the shore. It fairly darted through
the surf and the billows which marked the shore line, but before the
boat touched the beach, the Professor motioned them to come back. "Now
hold fast, when we strike."

In another instant they seemed to be lifted by a giant wave, and as it
receded the boat, impelled forwardly by the sail, struck the sand of the
beach the moment after the tiller had been brought hard to port. The
result was that the boat was now spun around with its stern toward the
oncoming wind, but the impact was so great that the entire left side of
the little ship was crushed like an egg shell.

"Release the boom, quickly!"

When that had been done the wrecked vessel was still, and the Professor
was lifted out of the boat, but he stood there grasping the side, too
stiff to move, but with that same smile on his countenance which had
told the boys on so many occasions before, how gratified he was at their
safety.

Poor Angel was actually a wreck. He had remained within the housed
enclosure ever since the storm began. When the rocking and tossing of
the boat ceased, and he heard nothing but the beating wind, he could not
understand what had happened.

All had forgotten the little animal. George was the first to go to his
rescue, and found him crouching in the extreme end of the enclosure.
After some coaxing he moved toward George, and when he was led out and
saw about him on one side the raging waves and on the other side the
land, his chatter turned to a chuckle, and he leaped to the land,
shambled up the bank, and catching the limb of the nearest tree, was
soon in its top, as happy as though ocean storms were unknown.

Meals had been forgotten since the day before. The boat was so high up
on the beach that they had no fears for the waves. Hunger asserted
itself now, and the moment the stove was brought out, Angel was down in
a moment, came over to George, and looked up inquiringly into his face.
It was such a comical situation, coming so close upon the heels of their
great catastrophe, that he could not help laughing. He knew what that
look meant, and Angel had more than the usual share of sugar. That with
the nuts, of which there was always an abundant supply, was a feast for
the little fellow.

After the meal a careful examination was made of the boat. The entire
left side, from the bow to a third of the way back from the midship
bulge, was broken to atoms. The inside of the boat was filled with sand
which had been driven in when the impact took place. To repair it would
be impossible without suitable lumber, to say nothing of tools. They sat
down, not with a feeling of despair, so that they might the better form
a judgment as to the wisest course to pursue.

"What interests me most," said George, "is to know where we are. Do you
think we are anywhere near West River?"

The Professor sat there musing, but did not answer. Harry ventured the
opinion that they must be far east of the mouth of that river.

Finally the Professor gave his views: "It is simply impossible for us to
speculate on the course of the river, because we were unfortunate enough
to pass it by in the night. It seems to me more probable, however, that
it finds its way to the sea to the east of the point we came around."

"What reason have you for thinking so?"

"Simply because the mountains were not, apparently, far inland, and it
seems to me that the promontory is merely an extension of the mountains
or the high ridge we saw."

"I would certainly feel more comfortable," continued George "if I knew
we were anywhere near the river."

But some decision must be made, and that without delay. If they were
near West River the distance home was fully seventy-five miles.
Preparations must be made for the trip on foot. The boat was, probably,
in as safe a condition as it could be higher up, nevertheless it was
concluded to take no chances, and all the provisions were removed, and
by means of levers and blocks, it was carried inland fully thirty feet
farther. A good supply of provisions was then taken, the guns and
ammunition removed, and put in separate piles, and arranged in
convenient packages for easy transportation.

The residue was carefully stored within the housed enclosure, and
carefully covered over. What grieved them most was the bedding, which
must be left, but the Professor insisted that all the articles of ramie,
which would afford some covering, should be taken along. They would now
be compelled to sleep in the open air, with nothing else to cover them.

With a last look at their ship, they moved toward the east with heavy
hearts.

Harry stopped before they had gone far. "It occurs to me that we ought
to put some inscription on the boat. If any of our friends should
discover the boat it might guide them to us."

"That is a capital idea," answered the Professor; and they returned to
put up the proper notice.

It was past noon, but they hoped to cover at least ten miles before
evening should set in, but the way was rough and broken. "I think,"
mused the Professor, as they halted on the journey, "we made a mistake
in not following the seashore. The only reason that prompted me to take
this course was the appearance of the shore to the east of our landing
place. It looked so uninviting that I felt sure we should find traveling
inland more comfortable."

During the first five miles of the journey the ascent was gradual, but
not steep, at any place, but now the land gradually showed a change in
character, growing smoother and more open, and they knew the grade had
changed and was taking them down to a lower level.

Before evening came, emerging from a light wood, great was the delight
at seeing a beautiful river before them. It was a broad stream, and they
divined that it must be the West River, which, they had so longed to
reach.



CHAPTER XII

THE RETURN TRIP. THE ORANG-OUTAN


Here they were on the banks of a broad stream, tired and hungry. The
experiences which they had gone through made the task of seeking
suitable shelter an easy one. An entire month of preparation had been
wasted. Aside from the lights which were seen on the fourth day on the
western shore, they had no more knowledge than when they started. It
seemed to be very discouraging.

But they were going home. This was the most comforting thought and it
made up for a great deal of the disappointments. There was real grief at
the loss of the boat. True, it could be recovered, but all this meant
time and hard work. It should be said, however, that at no time had
either of the boys ever found fault with the tasks that were allotted to
them.

In this fact the Professor found much comfort. It was a strong factor,
as he knew, in the lives of the boys. It required the highest sort of
courage to bear misfortune without complaining.

The camp for the night was soon made, and after a hearty meal all
retired for the night. Early in the morning the boys were at work, as
soon as the morning meal was finished, constructing a raft of sufficient
size to carry them across, and when the timbers had been securely lashed
and all their luggage placed aboard, the poles and primitive paddles
gave them a trying half hour to make the trip.

The stream was rather wide at this point, and it was believed to be near
the sea, and the suggestion was made to follow the stream down for an
hour, to ascertain whether the ocean would appear in view, and if not,
to take up the trail for the east.

In less than a half hour the sea was in sight. The course was then
directed east, but after traveling the entire forenoon through the most
difficult paths, it was decided to change the course to the south.

"If you recall, we took a more southerly course when we left the West
River on our overland trip, and found much better traveling."

The Professor's words recalled the incident, and the result was a change
to the southeast. This was now the sixth day after leaving home in the
No. 3. During the day at least twenty miles was made. Shortly before
night, George, who was in the lead, stopped, and then moved forward,
gazing at the ground intently.

Harry saw the movement and was at his side in an instant. "What is it?"
It was not necessary to continue his inquiry. Directly ahead was a
slightly cleared space, with a blackened space in the center, where a
fire undoubtedly had been made, and a few bones were still scattered
about as mute evidences of occupation.

The Professor looked at it a moment, and then smiled. "Don't you
remember our own camp fire?" This was the case. While they could not
remember the particular spot, they knew the old trail had been crossed,
and it was a comfortable, homelike feeling to come across the spot.

"Let us camp here again," said Harry, as he threw down his pack. On this
occasion they did not have the wagon and the yaks, but they had an ample
supply of food and there was no difficulty in making a fire.

Their first adventure came about noon of the seventh day. Plenty of
evidences of animals had been found, but they were not eager to hunt.
The trail for home had far more fascination than all the animals on the
island. It was the custom to stop at intervals for rest. During one of
these stops the cracking of bushes was heard, as though produced by a
cautious tread. The boys were alert at once and, with their guns in
hand, moved in the direction of the noises.

Not two hundred feet away was an immense bear, of the same species they
had shot near that place nine months before. The boys separated, as they
approached, under the guiding direction of the Professor, and when
within seventy-five feet, Harry asked whether or not he should shoot.

Bruin was slowly moving away, not directly ahead, but as though crossing
Harry's path. When the word was given, Harry took deliberate aim. George
reserved his shot, as advised. The moment the shot struck, the animal
turned, thus exposing a fair mark for George, who now fired. With a howl
at the second shot, the bear turned toward George, who immediately ran
to the right, and on the call of the Professor, circled to the right.

This brought the animal within range of the Professor's gun, and he
fired. It did not in the least check his pursuit of George, and the
Professor now became alarmed at his safety. Call after call was made to
advise him to turn to the right.

Harry followed as fast as he could run, and while keeping the animal in
sight, could not approach closely enough to get another shot. While
running, it occurred to him that he had not reloaded, and it would be
impossible to reload while running.

The Professor realized the situation, and immediately reloaded, and
calling after Harry, told him that he had a charged weapon. Harry heard,
but he was so excited and fearful for George that he could not decide
whether to stop or go on. He could see the bear, but George was not in
sight.

The Professor followed as rapidly as he could. Harry saw the bear
lumberingly cross a large fallen tree and pass on to the right, and
thinking George had taken that course, did not wait to go up to the
tree. Before the Professor reached Harry, who was now running at right
angles to the course of the Professor, George emerged from his place of
concealment behind the tree and laughed at the sport, which might have
had serious results but for the dead tree.

You may be sure no further effort was made to follow up the bear, and
they took up the search for their luggage, which had been left behind.
During all this hubbub, Angel had been left with the luggage, and he now
appeared along the trees, swinging from branch to branch, uttering the
most fearful shrieks and chattering, as he was in the habit of doing
when alarmed or excited.

"Something is after Angel; quick!" called out George, as Angel made his
way over to him. Harry grasped the loaded gun from the Professor and
started toward the direction from which the orang had come, but he
stopped suddenly after going several hundred feet.

"The bear has our things." The Professor and George came up, and there,
with his powerful claws and massive jaws, was Bruin, devouring their
best morsels and playing havoc with the packages that were piled
together.

The boys looked at the Professor, and he playfully answered the look by
saying, "We really don't want any bear meat to-day, do we?" George
thought it was a good joke on the hunters, but Harry was angered. "Let
us finish him. See him break that gun?"

The Professor was busy reloading Harry's gun, which he had exchanged
with him, and handed it to George. They approached, but not close enough
to venture a shot, when the animal deliberately turned away and darted
into the bush.

What was left of their luggage worth taking could easily be carried by
either of them. Practically all of the food was gone or ruined, and the
bear was recompensed for the little inconvenience by the two pounds or
more of sugar which was taken.

"Well, boys, everything has its compensations. We have nothing to carry,
and traveling will be easy for the rest of the trip. Let us take a good
laugh over the experience."

Harry was too much annoyed, first at the failure to hit the brute and
then at the mean trick in eating up and destroying their things while
they were trying to follow him. The Professor suggested that it would be
fun to visit Bruin's house that night when he came home and told his
family what a neat trick he had played on some hunters, and Harry
laughed, but it was an awfully forced effort.

When evening came they estimated that the distance still to be traveled
could not exceed thirty-five miles, and they were seeking a good spot
for the camp. The Professor was the first to make his appearance with a
small yellow pear, which he held up.

"What have you found now?" George inquired, as he came running forward
with a branch in his hand.

"Pears!" exclaimed Harry, as he took it from the Professor's hand.

"Not exactly a pear; but a fine fruit which we can use to good
advantage. It is the guava."

[Illustration: _Fig. 26. Guava._]

"What a beautiful white flower! I did not know that the guava had such a
delightful odor. In what way is it prepared and used?"

"You will see, by tasting it that the pulp is very aromatic and sweet.
Its principal use is for jellies and preserves, and the rind stewed with
milk makes an excellent marmalade."

"Have you found many of them?"

"There are several trees over there, and it seems to me that it is a
good place to put up for the night, and we can gather a quantity of
them."

Several trees were in sight, about 18 feet high, beautiful branching
specimens, and beneath one of them the camp was made for the night.

While they were seated the Professor noticed the branch which George had
brought. It was a stem about two feet long, with a lot of leaves on each
side, and at the juncture of the leaves with the stem were rows of what
appeared to be nuts. These were in the form of clusters.

He picked it up. "I thought I had made a good find in the guava, but
this is still better."

"The nuts around the stem are what attracted me, and my curiosity was
aroused."

"You took this from the coffee tree."

[Illustration: _Fig. 27. Coffee._]

"Is it the real coffee?"

"It is the genuine article. I have searched for it from time to time.
Let us go over and see the tree. We must cultivate its acquaintance."

They responded with alacrity. They were now going to have coffee. The
tree was fully twenty feet high, and the branches extended out
horizontally from all sides.

"Earlier in the season these nuts, as George called them, looked like
cherries."

"But where is the coffee?"

"Inside the berry. Each berry contains two seeds. You know how the
coffee berry looks. Let us open one of them. See, it is smaller than the
ordinary berries, as you know them, but the kind we know are cultivated,
which makes them larger, and fuller in appearance. These will make fine
coffee, however, and I think we shall have to divide our load with the
guavas."

"Where did coffee originally come from? Is it found in many places
throughout the world?"

"The plant is supposed to be a native of Arabia in Asia, and of
Abyssinia, in Africa. From Arabia it was carried to most of the tropical
countries, but many varieties have been found in the western hemisphere.
Even in Canada certain kinds of coffee plants are known. It is not,
therefore, a wholly tropical plant. The Abyssinian coffee has been known
from the earliest times."

"What is regarded as the best kind of coffee?"

"The best coffee of commerce is the Mocha, and next comes Java, and the
principal coffee center of the world is Brazil."

On the morning of the eighth day they were awake early, and the boys
began work on the berries. Angel took a hand in the proceedings, and as
soon as he discovered what the boys were after he volunteered to harvest
them. At this time the berries had somewhat hardened, and when Angel
knew what was wanted, his long dextrous fingers were able to strip off
more of the fruit in one stroke than the four hands of the boys. Harry
was on the lower limb, and as fast as he had stripped a supply, would
drop them into the outstretched cloth which the Professor and George
held.

Angel eyed this proceeding, for a time, and then imitated Harry. How did
he ever learn the art of picking coffee berries? The orang lives
principally on nuts and berries, and the instinct to gather these was a
natural one.

In an incredible short space of time fully a bushel had been taken off.
It was the original idea of the boys to cut off the limbs, but they had
seen none of the trees before this, and the Professor advised them to
pick the fruit itself. Without Angel's expert help it would have been a
long job.

With a load of guavas and another of coffee, the five guns, and a few of
the other relics of their ill-fated expedition, was sufficient for the
two days' journey still before them. That afternoon, while resting by
the side of a little stream that flowed to the north, the antics of
Angel attracted attention. He was usually so quiet that no notice was
taken of him.

He had two peculiar ways of making himself understood. One was a
gurgling sound, which indicated pleasure and contentment; and the other
a chatter, or half a shriek, when intensely excited or alarmed. But now
he did neither of these things. The sounds emitted could not well he
described.

The sounds were made while springing from branch to branch. When he had
attracted George's attention he ran forward, usually along the branches,
but close to the ground. George followed. Whenever he attempted to go
back to his comrades, Angel would come back, and in his most beseeching
way endeavor to induce George to follow. His actions were well
understood in this respect, because it will be remembered that he
directed the attention to the missing team, and afterwards rediscovered
the trail after it had been lost.

"Follow him, George, and we will bring the packages," was Harry's
suggestion.

It was not necessary for them to go far. Beyond, in some large trees,
were three immense orang-outans, intently gazing on the newcomer. George
ran back, crying out: "See the orang-outans in the trees! Isn't this the
place we captured Angel?"

Harry threw down the load and was by the side of George without a
moment's delay. "Where is Angel? I am afraid this is the last of the
little fellow." And Harry showed his grief. They saw Angel on his way to
the trees, and without waiting for an invitation, was up among the
branches, visiting his friends, and, probably, his parents.

All stood there awaiting the results breathlessly. Not a word was
spoken. Without hesitation he swung himself to the last limb, on which
the patriarch perched. Not a hand was lifted against him, but they
looked too astonished to speak, even if they could.

Angel went from one to the other. He petted them, as George had often
petted him. He knew what a caress meant, but his kin did not. It was too
much for George. "Come down, Angel; good boy; come down." And he said it
pathetically, too.

Not a hand was held out to him, nor did he get any sort of welcome, and
yet he had expected so much, from what he tried to tell George, while on
the way to his old home. It was too much for him. He heard that familiar
voice, and the call that was always a welcome one, and he slowly
descended the tree, not with that springy motion which characterized his
ascent, but hesitatingly and in measured swings.

He went up to George and leaned against him, and then they knew that
Angel intended to go home with them again. But they could not help
watching the effect of Angel's actions on the animals in the trees.
Ordinarily, they will quickly spring away from any intruders, as they do
not generally consider the trees high enough to give protection. Their
remarkable agility enables them to travel faster by the tree line than
man can follow on foot.

But now that Angel was again with the boys, all sense of fear seemed to
leave the three creatures in the trees. They looked down at the
proceedings, and as the boys passed by they sat in their specially
prepared seats, as though they knew the care which had been bestowed on
their offspring.

This little incident affected all more than it is possible to tell. The
animal was really a marvelous character. True, George had spent hours
and days in his education. He knew many of the words, and could execute
missions, and did many things to aid George in the work at home, and it
would have been a trial and a sorrow to miss him.

The next day would see them home again, and they could hardly restrain
themselves at the thought of it. What if some one should have visited
them while absent? Why might not the savages have found their abode?
These were questions ever uppermost in the minds of all.

Before noon they reached the Cataract River to the west of the forest.
This seemed like an old friend. And what was more: before they had gone
many miles, the Professor pointed to a clearing, and remarked: "Do you
remember this place?"

The boys looked about, as they moved forward. "I do not recollect the
place," was George's answer, but Harry now recalled the fight of the
bears, and the honey tree, and without saying a word he ran to the tree,
which was still lying there, and said one word, "Honey."

George now remembered, and Angel began to gurgle.



CHAPTER XIII

THE STRANGE VISITOR


In the afternoon of the ninth day, emerging from the forests, the first
sight that met their eyes was the flag floating from the top of
Observation Hill. Never before had the flag looked so glorious, and they
could not repress a shout and a cheer. The distance home was at least
four miles, but tired as they were, no one felt like stopping for a
rest.

Everything at the home seemed quiet and peaceful. The cattle were there,
lazily scattered about, apparently not knowing or caring whether their
masters were absent. The boys were moving along jauntily, happy as
larks, singing snatches of songs, and amusing the Professor with sallies
of wit and humor.

Angel was just as happy and was enjoying the prospects of coming home.
Long before the home was neared he started off on a race, with George at
his heels. Burdened as he was, it was impossible to keep up with the
animal, so that the latter was at the house long before George came
near. He was surprised to see Angel bounding toward him with his
peculiar chattering that betokened excitement, and he stopped and
hesitated what to do.

Depositing his load on the ground, he ran back, and signaled to the
others. Angel came up and tried to tell them in his peculiar way of some
danger ahead. Two hundred feet south of the house was a thick growth of
underbrush, and to that the party made its way.

Arriving there, a consultation was had, on the course of procedure.
Nothing was, apparently, disturbed. No sign of human presence was
manifest. The door which opened to the main room, facing the west, was
closed, as well as the room of the workshop.

"If anyone is about the premises he must be beyond the house, as it is
evident some signs would show in the house or shop. Prepare your guns
and let us go forward."

The house was cautiously approached, and reached, and Harry quietly
gained the door, and the secret bolt opened. The door was slowly opened
and he peered in. It was unoccupied, and all rushed in. A small
trap-door on the northern side was now opened, which gave a view toward
the shop and cattle-yard.

What they saw there startled them beyond measure, for seated on a log,
outside of the cattle-shed, was a man, with a straggling, unkempt beard,
vacantly gazing into space.

"How shall we attract his attention?" asked Harry, breathlessly.

"Let us rush out the front door. He is, apparently, alone."

At the signal, with their guns ready, they filed out, and moved toward
him. He raised his eyes, and at first was a little startled, but again
relaxed, and seemed to take no particular notice of their approach. The
Professor walked toward him, and held out his hand. The stranger made no
motion or protest, either of fear or recognition, and as the Professor's
hand touched him, his hand was involuntarily extended.

[Illustration: _"The professor walked toward him and held out his
hand"_]

Not a word was uttered by him. The Professor turned to the boys. "He is
demented, or has lost all knowledge of his condition or surroundings.
Poor fellow!"

The Professor addressed him. He looked startled at the sound of a human
voice, and as the voices continued, began to look inquiringly at one and
then at the other. He was a man fully fifty years of age, strong, well
built, but somewhat emaciated. His eyes had no luster, the beard was
long and shaggy, and aside from the torn and almost unrecognizable
trousers, the only article of clothing was an equally dilapidated shirt.

George grasped Harry, excitedly. "Where did he get that shirt? That is
the one we used as our first signal flag, and which we lost five months
ago." Such was indeed the case. The only thing in its torn and tattered
condition, which enabled him to recognize it were the initials of
George, which he had noticed.

Thus was one of the mysteries explained. Despite every attempt at
conversation, not a word escaped his lips. The Professor took him by the
arm, and led him to the house. He entered and looked around not
particularly interested, but more in curiosity than otherwise.

"What do you suppose he has been living on, and where has he been
staying?"

At the suggestion of the Professor, some food was brought, and placed
before him. He gazed at it. A knife and fork were on the table. He
reached for them slowly, and when he had grasped both began to eat
ravenously. He finished without looking up, and when the last morsel was
eaten stared about, and a faint smile appeared, which was the first
facial change that had crossed his features since they met him.

He was conducted to a reclining chair, and such articles of clothing as
they could find were brought out and laid before him. He gazed on them,
and slowly picked up one after the other. His feet were bare, and
appeared to have been scratched and torn, but they were hardened by
contact with the earth. An old pair of shoes, the ones discarded by the
Professor, when they turned out the first lot of shoes, was set before
him.

He picked them up and mechanically put them on. "Now let us leave him
alone for a while." They went out, closing the door, and Harry stole
around to the small port which he had opened, and watched the stranger.

His demeanor did not change after they left; he simply glanced about the
room. When his eyes fell on the table, he arose and cautiously
approached, and suddenly seized the table knife, with just a slight
change of countenance. This he attempted to secrete beneath his ragged
shirt.

"Do you think he is dangerous?"

"His malady is a peculiar one, and arises from various causes. I do not
think we need fear him."

"But see how he took that knife."

"That was simply an instinct; that of self-protection. Any other
implement would have been as acceptable as a knife. Possibly, the sight
of the knife, temporarily, may have brought back some glimmering
remembrance of his sane moments."

"Do you think he is insane?"

"No; it does not appear to be of such a character. He seems to exhibit
loss of memory. Imbecility, idiocy, and lunacy exhibit marked
tendencies, and have been made the careful study of many eminent men,
and it is even now one of the disorders least understood by the medical
fraternity."

"What is a lunatic?"

"Blackstone, the great English authority on law, defines it as 'one that
hath had understanding, but by grief, disease, or other accident hath
lost the use of his reason.' This eminent authority also stated that
lunatics may have frequent lucid intervals, and might enjoy the use of
their senses during certain periods of the moon. It is from that source
we are indebted to the still prevailing idea of the moon's influence on
the human mind. That view was exploded long ago, and shown to have no
foundation."

"What is the difference between a lunatic and an insane person?"

"The original term was lunatic, in accordance with Blackstone's
definition; but in medical science the terms insanity and mental
alienation have taken its place."

"Doesn't he act peculiarly? He does not seem to know we are present.
What I cannot understand is, how he knows enough to get anything to
eat."

"That is a peculiar thing in nature. Here is a man who has, outwardly,
the appearance of an intelligent being, incapable of talking, or
uttering intelligible sounds, with memory so submerged that he doesn't,
likely, recognize his own kind, and yet has been able to find food for
at least five months, to our knowledge. It shows that, irrespective of
mind, nature has implanted some kind of an instinct of preservation in
living beings. The subject is one that has been discussed from many
standpoints, and it can never be exhausted."

The boys now went over the entire premises, carefully examining every
part. Evidences were plenty to show that the man had slept in the shed
adjoining the stable, and the shells of nuts as well as barley heads
were found around the place he had slept.

There was everything to indicate that his trials and sufferings on the
island had deranged him. Probably his was a case like many instances
known, where consciousness of self--the absolute loss of memory, had
caused disappearances, and many instances have been recorded where
intelligence finally asserted itself and brought back former
recollections.

The instinct to clothe himself was shown when they returned. The
Professor went up to him kindly and spoke. The words were repeated in
German and French, but not one word did he utter, nor did he give the
least visible sign of recognition.

During the afternoon he wandered around from place to place. The boys
were too much fascinated to turn their attention to anything. George
started out for a trip to Observation Hill, accompanied, as usual, by
Angel. The strange man was passed on the way. Without a sign he
followed. George was a little frightened, but soon recovered, as he
walked along unconcernedly.

They crawled up the steep ascent, instead of going around the gentler
ascent, and when the pole was reached, the stranger for the first time
took any interest in anything he saw. He looked up at the flag, and then
out over the sea, and as he did so, he put up his hand to shade his eyes
from the glare of the sun. This was the only human thing which was
noticed about him.

When George left, he followed, walking erect, and he could not help
admiring his strong, although drawn, features, and the admirable build
of his frame. He would be an antagonist to fear as an enemy.

On the return, George stated the occurrence, and the Professor said that
the man was no doubt used to the sea, as his walk betrayed that, and the
incident of shading his eyes is a common one to all seafaring men.

But now came up the great question of the future course to be followed.
What should be done? The determination to again attempt further
explorations was fixed in the minds of all; but how should it be
conducted? Should they again brave the dangers of the sea, or make the
next trip by land?

The only means available by sea would be the partially damaged boat,
which was seventy-five miles away, and plans were considered either to
bring it to the Cataract by boat, or to repair it where it lay; either
course had its disadvantages.

One day the stranger wandered over to the workshop where Harry was
engaged. He had never been inquisitive, as nothing seemed to interest or
appeal to him. When he saw the machinery, the lathe, and, finally, the
electric battery, he stood still and gazed. Slowly he made his way to
the battery which had the terminal wires lying loose. He picked them up,
and brought the ends together, and the spark seemed to fascinate him.
The experiment was repeated several times, but the wires were soon
dropped, and he resumed his usual demeanor.

Harry ran over to the laboratory, and informed the Professor, who came
at once, and arrived just as he was dropping the wires.

"The best thing for him is something to do. In this way, the association
with tools, if he has any knowledge of them, may awaken some
recollections of his past. I have watched him for the past three days
and I am sure he is not deranged, in the sense of being demented. Let us
try what employment will do."

Harry was engaged in dressing a board with a plane when the man came in.
The Professor led him to the bench and placed a plane in his hand, and
by making a motion with his hand and pushing the man's hand along with
the plane, he took notice of the motion and mechanically drew the plane
back and forth.

He not only planed the board, but he followed up the roughened parts and
finished the job in a workmanlike manner. The saw was placed in his
hands, and he handled this with a facility that surprised both of them.
He did not look like a mechanic, but on the other hand had every
appearance of a literary man, but he was, unquestionably, used to tools.

After considering the all-important question of the exploring
expedition, which subject was an ever present one, it was agreed that
the wisest course would be a trip by land. They now knew the location of
the inhabitants of the island, and with proper equipment, they ought to
be able properly to defend themselves. Another element which might prove
of value to them was the new acquisition in the man who had come so
unaccountably to their home.

One of the first things necessary was to give him some name by which he
could be known, and which he would in time recognize. This was debated
over and over, without coming to any conclusion. Eventually, in the
absence of anything better, it was decided to call him simply John.

When Harry went to the shop where he was at work, he addressed him as
John; and at the uttering of the word started, as though he had been
alarmed. Harry noticed it, and repeated the name several times, with the
same result, and he hastened to inform the Professor of this experience.
The Professor went down without delay, and it was evident from the
actions of the man that he recalled something familiar in the name, as
in every instance he would put his hands to his head and give an
inquiring look.

"It is my impression that John is his name, as he would be more likely
to remember that than anything else connected with his life. Let us keep
him occupied, and his work may also be the means of bringing back
familiar things."

The boys, in company with John, set about preparing a good bed for the
newcomer, and he took a part in it most heartily, and seemed to
understand when the Professor pointed to him and the bed that it was
intended for him.

The interest was more intense when he was taken to the boathouse, which
Harry had opened, and when he saw the boats, his eyes opened wide and
grew brighter, but they suddenly lost their color and he relapsed into
his former state.

It was truly pitiful to watch him, and when in the evening they sat
together and conversed, they felt that at times he must have gotten some
glimpses of his individuality.

In the morning when George went out to the cattle pens to milk, he
mechanically grasped a pail and followed, and the milking operation
seemed to be a familiar one to him. Thus, he was a mystery, for the
reason that he seemed to be at home in every direction where it called
for any special activity. This was made the more mystifying when, during
the next day, he wandered over to the laboratory, and his eyes caught
sight of the skulls and the skeletons which were on exhibition.

He walked over to the skulls, and picking up one poised it on his hand,
slowly turning it around, as though trying to discover what it meant.
The one selected had one side partially crushed, and this attracted his
attention. He placed the fingers of the other hand in the shattered
part, and seemed to realize that some agency must have caused it. The
whole deportment while examining it was that of one who was called upon
to make an examination of it for the purpose of determining the cause of
the injury.

When he laid it down, he looked at the Professor, who quietly took up
the skull and pointed to the fracture, endeavoring by his conversation
to strike a word or keynote by which some recollection would be started;
but he was mute and soon again became listless.



CHAPTER XIV

AN EXCITING TRIP TO THE FALLS


The food supply was now the first thing to consider, as all necessaries
in the way of vegetables, as well as meats, had been exhausted when they
started on the last trip, and a new lot had to be laid in. The matter of
butter was always a hard problem to take care of, and George referred to
this difficulty, and before they sailed away the Professor told him
that, on their return, the first thing to do would be the construction
of a machine which would simplify the production of the butter.

"As we are going to use more butter, I think it would be a good thing to
start in on our cream separator," said George, who, while he was not an
adept, like Harry, to devise the things required, was always ready to
suggest things that could be made to advantage.

"I know that Harry will be very glad to set to work on that, so we might
as well commence," answered the Professor.

"What is the principle of the separator that causes the cream to break
away from the milk?"

"Centrifugal motion is employed to bring it about."

"But how does that motion affect it?"

"When you put a ball on an elastic and swing it about your head in a
circle, the elastic stretches in proportion to the speed at which you
swing it. You have probably seen it done. It is stretched in proportion
to its weight, also. These two things, therefore, are properties of
centrifugal motion. Cream is the fatty portion of the milk. It is
contained in little globules, and when the milk is allowed to stand, the
milk surrounding the globules, being heavier than the cream, forces its
way to the bottom, and the cream by that means goes to the top. The
inventor has taken advantage of this fact by making a machine which will
take the milk and impart to it a very high centrifugal motion, and in
doing so the milk particles, on account of their greater weight, force
their way outwardly and the cream inwardly. The machine is also so
arranged that the cream and milk are drawn from it at separate points,
and this operation is a continuous one."

Harry quickly understood the machine from the drawing made for his
guidance, and in Figure 28 a sketch is made, showing how it was
constructed.

[Illustration: _Fig. 28. Cream Separator._]

A frame was made which had a base (A) and two standards or uprights (B,
B), and between these uprights were a pair of horizontal bars (C, C).
These bars served as supports for a vertical tube (D), the tube being
journaled in the center of the cross bars, so that it extended above and
below the bars, and had a small pulley (E) between them.

Below the lower cross bar the vertical tube has two radiating tubes (F,
F), closed at their outer ends, but communicating with the bore (G) of
the tube (D) by means of two orifices (H, H). The bore (G) extends down
to a point a little below the orifices (H, H), and a small tube (I) runs
through the tube D, within the tubes F, F, the ends of the tube being
open. A duct (J) centrally through the tubular piece (D) communicates
with the bore of the tube I. One each side of the tube D is a little
tube (K), which communicates with the inner end of each tube (F). A
receptacle (L) is attached to the tube D below each tube (K), to catch
the cream.

The operation of the machine is as follows: When milk is poured into the
top of the tube D, and the latter is set to rotate at a high speed, it
passes down and out through the ducts (H, H), into the horizontal tubes
(F, F), with the result that the cream is prevented by the heavier milk
from reaching the outer open ends of the tube I. As a result, only the
milk passes inwardly through the inner tube, and is discharged
downwardly through the duct (J), whereas the cream passes out through
the small tubes (K).

The quest for a supply of vegetables was now a part of the daily
occupation of some in the colony, as the garden had not yet advanced to
that stage where anything could be gotten from it. One morning John was
missing, and there was a great deal of speculation as to his
disappearance.

Before noon he reappeared, carrying in his arms as large a quantity of
vegetables as he could carry. Harry was the first to see and welcome
him. He recognized beets and was delighted to find that John understood
what they were after. When the Professor was informed, he gave a hearty
welcome, and John seemed to recognize that his efforts were appreciated.

"Ah! I see you have some onions," he said, as he beamed on him.

"Onions!"

"Yes; the wild onion, the progenitor of all the onions. One variety of
this is a species called chives, used as a salad, and is known
throughout Europe under that name."

"But this beet is very small; is it also wild?"

"There are four varieties of the beet. This is the most common of them
all, and grows in a wild state in many parts of the world. The
Mangelwurzel is a larger beet, and coarser, and is much used for cattle
feed. If you want to give your cows a treat, this would be the food to
give them. Then there is a kind called the chard, also a good variety.
If possible, we should try and get John to show us where he found them.
Undoubtedly it was along the sandy part of the island."

The first real surprise manifested by John was when the yaks were
hitched up and he was invited to join them on a trip. His eyes seemed to
show some glimmer of intelligence when he slowly crawled up into the
wagon. Their course was directed toward the forest to the west, and the
trip there, which occupied nearly two hours, was a constant source of
pleasure to all.

On the way the animals were stopped at intervals to allow the Professor
and George to collect specimens of plants and to seek for ores. And here
occurred the first real symptoms of returning consciousness on the part
of John. As the Professor was moving toward a hill, with a small pick,
he was seen to pick up one of the little hammers and follow.

Without seeming to notice either of the party, he undertook to explore
on his own account, moving here and there along the hillside and
occasionally stopping to examine and chip off samples, which he
carefully laid down, but when this was done, entirely forgot to collect
them. The act of procuring the samples seemed to be the absorbing
element. He thus went on, never returning to the places where they were
deposited.

"That action on his part shows a remarkable phase of his malady. Notice
how carefully he puts them down and how uniformly he forgets that he has
done so. The mind, in his condition, is so disordered that it cannot
reason with any degree of sequence. He recalls only one thing at a time;
but if I am not mistaken, he is a man of culture, and his every act
shows that he was a man of broad intellect. I hope we shall be able to
restore him to his normal condition."

The guns had been taken along, as usual, in order to do some hunting,
and while the Professor and John were engaged in prospecting, the boys
were after game, in which they were more than ordinarily successful, the
bag for the first hour being a half dozen pheasants and several
squirrels.

When the Professor returned to the wagon with several loads of samples
which the two had gathered, George insisted on penetrating the forest
still farther, their direction being toward the falls in South River.
Before long they came across the trail which had been taken by the yaks
when they made their flight some three months before. They were now not
to exceed two miles from the falls.

Angel, who was with them, now began one of his peculiar chattering
exhibitions which betokened alarm, and the yaks exhibited a restless
disposition. Harry moved forward to ascertain the cause, and before he
had gone two hundred feet, saw the cause of the disturbance. It was one
of the largest bears which they had so far seen, standing alongside of a
large fallen tree and vigorously working his immense paws.

He ran back to the party and gave the information, and the Professor
seized a gun, but John instinctively, as it were, grasped one of the
spears and darted forward in the direction Harry had taken. The bear
paid no attention to the party, and when the Professor came up, he said:
"How fortunate it is that we shall be under obligations to the bears for
our second treat of honey. I do not think we ought to attack him after
rendering us this service."

John was restrained from going forward, and he cast a peculiar glance
toward the Professor. "If there is honey there," replied George,
eagerly, "let us drive him away, at any rate."

But Bruin would not be driven away. He sprang down from the log,
growling and pacing back and forth. Occasionally he would leap back on
the log. It was plain, that he was after the honey and regarded it as
his special property.

"Well, George, suppose you give him a shot as a reminder that we need
some of that honey?"

He needed no urging, and taking a rest alongside a sapling, fired a shot
with one of the long guns. The shot was answered by a terrific growl,
which ended in a prolonged roar. Without waiting for another summons, he
made a line for George, who ran back. This was more than John could
stand, who now ran directly to the bear with his sole weapon, the spear.

Neither of them could restrain him, but all sprang after him. It was a
challenge the bear sought, and John did not in the least check himself
until within ten feet of the animal, when, with a light spring to one
side, he directed the spear against the side of the bear as he passed in
his rush. While the spear entered the animal, it did not reach a vital
spot.

Harry was about to fire, but the Professor held up a hand. "Have a care,
unless you are able to control yourself well. You are likely to hit
John." The bear turned, but John made no motion to avoid him, and again
the bear charged. This time John did not jump aside to exceed two feet,
and again plunged the spear forward, and as the bear's lumbering body
moved forward fully ten feet or more before he could bring himself to a
halt, they saw that the spear had broken off, and the terrific growl of
the animal showed how badly he had been wounded.

John made no effort to escape, although he plainly saw the broken end of
the weapon, and the Professor, surprising as it may seem, did not
encourage a shot. The effect of the last stab was apparent, however, as
Bruin did not turn after the last attack, but, with an expiring growl,
sank down.

He was a magnificent specimen. The Professor went up to John and held
out his hand in recognition of his wonderful feat, and he seemed to
realize the nature of the commendation bestowed on him.

The work of skinning the animal was participated in by all. John seemed
to enjoy it, and by his actions showed that he was at home in this sort
of work. You may be sure that his actions throughout the day were such
as to give him a warm place in their hearts, and they recognized what a
valuable ally had come to them.

The excitement made them forget the honey tree. They were recalled to
that by Angel. He had made his way there after the battle ended, and was
now in the seventh heaven of delight, and when George arrived to take
possession, Angel was covered with a mass of the delicious sweet and
fairly gorging himself.

As no provision had been made for carrying the honey home, the boys
remembered the first attempt at conveying it, and after the skin had
been removed, it was taken to the hive, and it was a pleasure to all to
remove the comb and every part of the coveted treasure. A luncheon was
prepared, and for the first time in two months the use of their sugar
was dispensed with.

"As we are so near the falls, why not go there, and possibly the sight
of it may recall something to John?"

George and Harry looked at the Professor for an inkling of his reason
for the remark, but he appeared not to notice them.

As the distance was not great, the course was directed along the very
trail that the runaway yaks had taken from the river some months before.
The moment the river was reached, John sprang from the wagon and made
his way to the shore and stood there gazing, and as his eyes turned to
the right and he saw the falls, he slowly turned to the Professor, as
though he was about to say something, but there the quest of his eyes
ended, and all recollection seemed to leave him.

George could not restrain himself any longer. "Why did you make the
remark that it would be well to bring John here to see whether or not he
would be able to remember anything?"

"I was anxious to see if he would recognize the stream, and possibly
recall the boat."

"What boat?"

"The boat we left here."

"And do you think John took the boat?"

"It is my opinion he took the boat, and then forgot it. During that
lapse it was washed down to the sea by the flood."

"But how do you account for the oars and the rope which we found in it?"

"He must have put them there."

"Where do you suppose he got the oars and the rope?"

"That is the peculiar part of the problem. The rope, if you will
remember, looked as though it was made by savages. At any rate, it was
not a regulation rope; but the oars were undoubtedly taken from the
_Investigator's_ lifeboat."

This was interesting news to the boys. It did seem probable, after all,
that John had something to do with the lifeboat as well as their own
boat.



CHAPTER XV

THE STORY OF THE CAVE


An hour or more was spent on the shore of the river, passing along its
banks and investigating the proximity of the falls, but if there was a
glimmer of intelligence, John did not exhibit it. All realized this one
thing: that if his memory could be brought to its normal condition, he
would be able, undoubtedly, to reveal some of the mysteries they longed
to unravel. For all they knew, he might have been one of the crew of the
_Investigator_, but this, after all reflections, was out of the
question, because life on shipboard is rather intimate, and boys, above
all others, are most likely to remember faces.

Neither had the slightest knowledge of ever having seen him, and it was
now felt that they must await the time when he would again regain his
consciousness by the orderly course of nature.

While on the way home, George, who was seated by the Professor, mused
over the occurrences of the day. "It has always been a wonder to me to
know why it is that humanity must always be surrounded by a mystery of
some sort. It seems there is always something just beyond him, and he
must struggle and work to find it out. Why is it?"

"You have asked the great question of the ages. It is an eternal
question. Why should man know everything? That would be omnipotence. If
you stop to consider, it will occur to you that the moment man knows
everything he ceases to be a man. All energy, all effort, and every
instinct in life fades away. The association of man with man would
cease. Take the simple act of one lady calling on another. Do you think
it is merely to look at her friend, or is it done to make some inquiry?
Every action in life has in it some desire to acquire something, to get
that which man did not possess before. The quest for the things of this
life become and are the great pleasures which man enjoys. It is not
their possession. Men pursue pleasure. That is a seeking after something
just as much as hunting for wealth."

Returning to their home, the samples which the Professor and John had
gathered were carefully taken to the laboratory, and several of the
large copper receptacles cleaned for the honey. This was the part which
Angel enjoyed more than anything else. And here it may be remarked that,
when John was installed, Angel was a little shy with the stranger, but
gradually became accustomed to his presence. Somehow John could not
fully understand the creature, and often would be seen following his
motions; but within a week Angel would permit himself to be caressed
without objection, and he seemed to know that no harm could come from
the kindly faced man.

Notwithstanding the mystery of their new friend, there could be but one
course to follow. They lived on the island and were a part of it. The
longing to know what the other side of the island contained was an
ever-constant inquiry. Something must be done to forward their efforts
in that direction.

During the four weeks at home a good supply of provisions had been
gathered, and now the plans were made for an overland journey. The
wrecked boat was still near the mouth of West River. It would be a
week's trip to bring it home, and this was not considered advisable,
particularly as the monsoons were still blowing, with greater or less
violence and frequency.

It may well be imagined that the boys had not forgotten the cave. It was
their constant talk by day and their dreams at night. It had a
fascination which was constantly drawing them in that direction, but,
singularly, they never entered it. But one day George suggested that
they make a search on their own account. Harry quickly assented, and
taking up the two lamps, together with their weapons, were soon at the
entrance.

They cautiously went down the stone steps and directed their way to the
recess where the treasure was deposited. The skeletons had been buried
on a previous visit, so they did not have that grim recollection to
ponder over.

What interested them most was the chamber to the east which had been
examined by the Professor, and to that they made their way. During the
first two hundred feet the direction was to the east, or nearly so, and
then the walls suddenly turned to the right, and here a sight met their
eyes which bewildered them.

The chamber was a gorgeous one, not so large as the one in which the
pirates had their booty, but the calcareous hangings on the walls were
far superior and possessed greater decorative effect. From a point near
the center of the cavern, they turned and examined all sides, and to the
south was what appeared to be an outlet, and this was approached.

They moved nearer with a silent tread, as though fearing the ghosts of
the past century would rise to receive them. They saw a recess, cut like
a room in the side of the walls, symmetrical in form, and fitted with
all the comforts and luxuries that humanity could wish, but it was
crumbled, and crumbling, and everything fell at the touch.

Here, scattered about, were the remains of a table, and among its
crumbled ruins were gold and silver vessels. There was a mass of debris,
among which could be recognized articles of human manufacture and use,
but all covered with the everlasting carbonate of lime, which gave it
the color of death and the shroud of a sepulcher.

Not a word was spoken. They moved from place to place and touched the
objects. What appeared to have some resemblance of a rigid form fell
away, just as they had seen it in the other portion of the cave. What
surprised them most was the entire absence of any firearms, although
they remembered that the Professor had said the other portions of the
cave would show that the pirates had plenty of guns.

This incited them to further search. Could it be possible that the
Professor had not seen this part of the cave? Their own tracks could be
made out in the soft stalagmites on the floor, and retracing their steps
to the center of the chamber, they searched back and forth to determine
whether or not he had visited this portion.

Nothing was found to satisfy them on this point, but, passing on beyond
the first recess entered, they were amazed to find a second grottoed
recess, similar to the first, but much longer, and here, with merely a
wall separating them from the other recess, was an orgy of bones and
weapons.

It was such an unlooked-for sight that they almost staggered at the
scene. At one side was a row of chests, fully six feet long, all white
and crumbling, and these were filled with the long Spanish guns of which
they had several specimens.

Here everything was in confusion. The final act in the drama enacted
here, whether before or after the battle in the other chamber, bore
evidences of annihilation. Here were skeletons, locked in their dying
embraces, still grasping cutlasses with which they closed the act. But
what interested them more than anything else were four skeletons,
reclining on a raised portion, with chains on wrists and ankles, which
looked like a mockery in their surroundings.

The captives had taken no part in the struggles. Were they being
defended? and who were the captors? The boys had no time to consider
these things. Other matters attracted them. The nook close by was a
veritable arsenal. It contained chests which, undoubtedly, were filled
with gold. The sights, their surroundings, the evidences of untold
treasure everywhere were enough to unnerve them for the time, and
George, with a voice almost hoarse, suggested that it would be well to
return. It was some time before they could make their way back to the
entrance, and when it was reached, they sat down, not knowing what to
say or what interpretation to put on the last discovery.

Nothing was said to the Professor about the visit to the cave. It must
be confessed that they felt a little sheepish about this, as such a
thing as deceiving the Professor was farthest from their thoughts, but
there was no concerted agreement to keep him in the dark. Either would
have scorned to enter into such an agreement.

The boys were more than surprised that evening when the Professor
brought out some of the treasures he had brought from the cave and
exhibited them. Among them was a crude implement of stone, which had the
appearance of a cutting instrument. Another was a small stone vessel,
unmistakably showing human manufacture.

The sight of these did not, at first, interest the boys, but when the
Professor stated that the cave was undoubtedly of very ancient origin,
George could not resist the inevitable question, "How can that be
determined?"

"In the study of paleontology an effort has been made to classify the
different periods of man's life on the planet, so that we have the stone
age, which is the earliest, the bronze age, and the age of iron."

"How far back in the history of the world has evidence been found of the
existence of man?"

"In the chalk cliffs of England, and also in like formations in Germany,
skulls have been found which indicate an existence back to a period
fully 500,000 years ago."

"What reason is there to assume that if they were found in those chalk
deposits, that they must have been that far back?"

"Because it was fully that long ago in the period of the world formation
when the chalk beds were made, and this seems to be conclusive evidence
of great antiquity."

"Is it not singular that more evidence of that condition is not found
than the recovery of a few bones?"

"Not when it is considered that the earth is constantly undergoing
change, first in one place and then in another. Have you ever heard of
the great continent, which was supposed to be lost in mid-Atlantic,
called Atlantis? Plato refers to it, and attributes the first knowledge
of it as coming from Solon, who visited Egypt and there learned from the
wise men that a great country, to the west of the Pillars of Hercules,
which Gibraltar was called in ancient times, had disappeared thousands
of years before; and they further informed the great Grecian lawgiver
that the earth had been peopled and repeopled many times before in ages
past."

"Why was it necessary to repeople the earth? Were they all destroyed?"

"They pointed out that at certain stages of the world's history great
floods came and destroyed all the people inhabiting the low places, and
at other times the terrific volcanic eruptions destroyed those who lived
in the hills, and at other times entire continents, like Atlantis,
disappeared, so that the earth had to be repeopled and the arts and
sciences learned over anew."

It is wonderful to relate how the life on the island affected the health
of all. They lived outdoors and had plenty of sunshine and vigorous
exercise. In the laboratory, the Professor made it a constant habit to
do all his work in the sunlight, to which he exposed himself at all
times. The boys often spoke of this, and one day, while talking on the
subject, he remarked:

"It is surprising how little the majority of people value sunlight. It
is not the visible sunlight that performs the wonders in giving strength
to man. If you recall, we spoke about the actinic rays which cause the
chemical changes on the photographic plate. It is those unseen rays
which produce the aurora borealis, exert a curative effect upon leprosy
and tuberculosis, fill the atmosphere on the sunny side of a street with
oxygen and nitrogen, and do many other marvelous things."

"In what manner does the invisible light produce these results?"

"In its sparkling radiations microbes die, decay ceases, the iron in the
blood becomes chemically strong; ozone is manufactured from the dirt and
dust, which are also destroyed; the perspiration becomes active and
carries off waste from the muscles and cleanses the skin; dead tissues
are purified and the muscles invigorated; and all life is made to
thrive."

"Does the sunlight have the same effect on all the animal creations?"

"This is true of all animate life, except minute organisms, or what are
called bacteria."

"If that is the case, why do worms and the like hide themselves in the
earth?"

"In that case it is the instinct of self-preservation. The most of them
are eyeless, so that sunlight exposes them to birds and other enemies.
Professor Mast demonstrated that they are very favorably influenced by
exposure to sunlight. Dr. Dolly has shown, by a series of very brilliant
experiments, that the butterfly will live three times longer in sunlight
than in the shadow; and Professor Yerkes has also proven that the
jellyfish, while inactive in the dark, becomes very strenuous in
sunlight."

"If that is the case, why wouldn't it be a good thing to have all houses
made of glass?"

"That is really what has been proposed. The Government of the United
States has set a good example in this respect by devoting over one-half
of the space of the new post-office building in Washington to an
arrangement which permits the interior to be flooded with sunlight."

In the really strenuous times which our colonists had passed through the
pleasures of fishing had been forgotten, and as that was an article of
food which all relished, and of which they had been deprived for some
time, Harry insisted that at least a portion of the following day should
be spent in that way.

John saw the preparations which were going on and entered into the
spirit of it in his usual listless way, but it must be said that there
was now more eagerness in his actions than had been theretofore noticed.

All saw the change that was perceptibly coming over him, and the
particular thing that George noticed was the character of the eye. "I
wish you would explain, Professor, why it is that the eyes of people so
affected are dull, and that when they recover the eye becomes bright?"

"That change in the character of the eye is expressed by everyone under
certain conditions. How much brighter the eye is when you are affected
by laughter. That is due to the duct which lubricates the eyeball.
Anything pleasant causes an undue amount of discharge, so that the
eyeball glistens, and we call it looking bright. The same principle
holds good in the case of one who is dull or listless, or, as in our
friend's case, has nothing to stimulate the flow of the secretions. The
moment he is affected, this is shown on the eyeball sooner than by any
other part of his body."

It will be remembered that in a former volume it was stated how Harry
had prepared a number of very creditable fishhooks, and these were now
attached to the ramie fiber cord and suitable poles were easily obtained
for the day's outing.

Aside from John, it was a merry party that left the Cataract that
morning, and Angel was among them. Several good fishing spots were
known, but the Professor suggested that a change be made and that the
trial for the day should be in the river below the Cataract, in the hope
that larger and gamer fish might be found. In all former trials only the
tame fish were caught.

Less than a quarter of a mile below the Cataract, and close to the mouth
of the river, was a small cove, with deep water, bounded by a sandy
shore. Here the party stopped and cast their lines. The Professor,
however, used a fly and fished with it at the surface of the water. As
on the previous occasion, he was the first to land a magnificent
specimen, which was so large that he had difficulty in landing it.

"What is that beauty?"

"It is a salmon; or it might be more correct to call it a salmon-trout.
Trout belong to the salmon family, and they are all game."

"Well, he certainly made a fight for it."

"Does the salmon live in salt as well as in fresh water?"

"They have a habit of remaining off the coast in salt water during the
winter months in northern latitudes, and then entering the rivers when
the spawning season begins, ascending the rivers slowly, despite every
obstacle that may be put in their way. When they reach a favorite spot,
the eggs are laid and are hatched out in countless numbers."

"Has it been discovered why they do this?"

"In order to escape their enemies, who seek the eggs. Even with the care
which they take in breeding, millions are destroyed, and it has been
estimated that if all the eggs laid were hatched out the number would be
so great as to prevent navigation along the shores of the coasts where
they thrive. In the rivers of Oregon and Washington the shoals of salmon
are frequently so great in the rivers as to make it impossible for a
boat to be navigated through them."

Harry was awarded with the second catch, which was fully fifteen inches
in length. It had a nearly cylindrical body, covered with exceptionally
large scales, and its head above convex. The striking thing about it was
the color, the back being of a bottle-green, light on the sides, and
silvery white underneath.

The Professor was on hand at once. "You have captured a fine specimen of
the mullet, not considered, generally, as a game fish. It is a
particularly fine table fish."

George came in for his share of luck, as well as John, who seemed to
enjoy the sport immensely. His eyes showed that. It was a pleasure to
all at this opportunity to bring something into the life of the poor
unfortunate so that he might be brought back to light again.



CHAPTER XVI

MUSIC AND ANIMALS


During the evening George suggested that as the trip was to be overland
it might be wise to can some of the fish, or to use some of the
receptacles found in the cave for this purpose.

"We might do that," said the Professor, "or they might be salted down,
and that would not necessitate the receptacles, if we dried them."

The salted fish did not appeal to either of the boys, and it was
accordingly agreed to put up several packages for food.

"Will it be much trouble to preserve them by putting them in cans?"

"If proper precautions are taken they can be preserved. The difficulty
is that the air is not excluded, and the mischief is caused by the gases
which form, in that case, and when the pressure becomes too great the
receptacle bursts."

"Why are the fish, or other substances, so canned heated and put into
the cans while in that state?"

"When a can is filled with the material in a heated state it has been
expanded to its highest point, and after the package is sealed properly,
no air can enter it, so that it is prevented from changing its condition
by any chemical action. Our difficulty will be to get a proper metal for
the cans."

"What is the best to use?"

"Tin, for the reason that tin is not affected by any of the acids which
are formed by fish or by fruit, which may be put in them."

It has been stated that the boys were both musically inclined, and
George had taken several courses of lessons on the violin before he
joined the training ship. If there was anything more than another that
was missed, particularly in the evenings, it was the lack of musical
instruments, to which all had been accustomed. As a result, the boys had
for some time worked on a violin, which was now nearing completion, and
they hoped it could be finished before the start was made.

The Professor discovered the partly constructed violin, and at once
showed his appreciation of their enterprise. "Now that you have the
body, what are you going to do for strings?" and he laughed at the
bewildered look. They had forgotten the one essential thing.

Without a word, he left them, and when he returned, held in his hand a
dozen or more hard, bony-like and dried-up reeds. "Possibly these will
do for your purpose."

"What are they?"

"These are the intestines of the wildcat we shot about ten months ago."

"Well, aren't they as good as the intestines of the common cat?"

"Undoubtedly; but violin strings are not produced from that source."

"Aren't they known as catgut?"

"That is true; but it is a mistake. The strings of commerce are made
principally from the intestines of sheep, and, singularly, have been
always designated as 'catgut.' Other articles from the same source are
hatters' bowstrings, clockmakers' cords, and thongs for whips and laces
for boots."

"What are the best kinds of strings for musical instruments?"

"Those obtained from Milan, Italy, are considered the best, on account
of their transparency and exceeding strength. Most frequently each
string is made up of two or three separate strands, twisted together
with the utmost care. But there is another use of the greatest value,
and that is as a thread for sewing up wounds in internal surgery,
because, being of animal matter, the thread will, in course of time, be
absorbed into the system, and thus remove itself, without requiring a
second operation to remove it from the wound."

"How is it prepared to make it suitable for our purpose!"

"The ones here I thoroughly cleaned at the time, as I knew they would
come in handy for particular purposes, but I had no idea of this kind in
view at the time. We must soak them and remove the inner and outer
lining. Potash, in solution, is best for the purpose. We must then draw
them through small holes, to give them uniformity, and keep them in a
receptacle which is filled with sulphur fumes. That is for the purpose
of fumigating them. They are then ready for the instrument. I think the
different sizes will give you a variety."

The directions were carried out, and during the following week the
violin was prepared for its initial test. The Professor was pleased with
the knowledge that the instrument was ready. It was plain that he
expected important results from that source with John. It is well known
that music possesses a wonderful power in the treatment of demented
people, and he was very anxious to try it in the case of one who had
lost all memory.

On the evening appointed the violin was brought in, and the boys had
arranged a program. Harry had a fine baritone voice, while George could
take a high note and sustain it as well as most sopranos. When all the
preliminaries had been arranged, the instrument was produced, and after
a little preliminary tuning, George played "America."

At the first strains of the violin, Angel, who was in the loft, came
down. He didn't stop to notice anyone but George. This was something so
unheard of that he appeared to be hypnotized, as he shuffled over to
George, and looked up at the instrument. He appeared to be entranced,
and when the music stopped he laid his hand on George's knee, and looked
up appealingly. There was not a single motion in his features which
showed appreciation or pleasure or excitement; but aside from that every
action of his body indicated exhilaration and undue animation.

The boys had eyes for the animal only; but the Professor watched John to
the exclusion of everything else. When the first strains vibrated he
glanced around, and saw the musician. From that moment until George
dropped the violin his eyes never ceased the stare. As the music
continued he appeared to be enraptured, if such a thing could be said of
a mute expression.

The Professor drew closer to him, and intently watched his eyes, and
before the first verse had ended the situation was so intense that the
Professor's hand involuntarily beat time, and it was evident that the
tremulous motion, which John now and then exhibited, was the inward
struggle for light.

Without turning from John, when the music ceased, he cried out to
George, in a suppressed tone: "Keep on; keep on!" This brought the boys
to the knowledge of the other drama which was being enacted. "Slower,
George, slower," was the request of the Professor; and while "America"
requires the jubilant strain of action and liberty, he obeyed the
injunction.

"Keep it up; can you play 'Home, Sweet Home'?" George could, and did,
and as the familiar strains floated through the air, John moved forward,
his head drooped down, both hands grasped the chair and he listened with
an intentness that was painful to witness.

When George stopped at the whispered suggestion, John raised his eyes
and looked around. The look was a different one than they had ever
noticed before. When he glanced at the Professor, Harry said: "Did you
notice the difference in his eyes?"

He rubbed his hands over his eyes, and stroked his head, and they
thought a glimmer of a smile crossed his features. When they were about
to retire that night, the Professor could not help but express his
gratification at the results achieved through the aid of the violin.

"I could not help thinking how nearly allied Angel and John were in the
manner of acting during the course of the music. I have no doubt but in
course of time the animal will, just like John, show the facial
expressions which characterize either pleasure or pain."

"But I have seen Angel actually laugh."

This was true; it had been noticed on several occasions. But so far John
had not laughed, and he had not changed his facial expression in such a
manner as to make it noticeable, and the evening's entertainment had
done more to affect him than anything which had occurred, and it was
their earnest hope that this might be a means to his delivery.

Harry was the only one to notice a field mouse which had appeared soon
after George began to play, and the little animal was joined by others,
but the subsequent events of the evening attracted his attention, so
that no notice was taken of them until they were about to retire, when
they scampered away and Harry then related how they had acted.

"That is an interesting thing. Some time ago the keeper of the Central
Park Zoölogical Gardens, in New York, employed a violinist to play for
the animals, and the results were very interesting. The first animals
approached were a lioness and five cubs. The tune played was 'America.'
She listened with mute and dignified appreciation, and her five little
cubs ranged up alongside in a row, and in the same attitude, all with a
wondering expression, and sometimes would act just as you often have
seen dogs do, turn their heads aside obliquely, as though the sound
could be better understood. The old lion in the adjoining cage also
stopped his restless movement, and peered at the player attentively. The
next animal was a tigress. When the playing commenced she first looked
startled. Her mate entered the cage and escorted her out into the yard
while he took up his position and listened, and refused to allow her to
return. The hippopotamus, on the other hand, got mad, and sought the
water for seclusion. The elephant appeared to be the most
discriminating, for while he deliberately turned his back when a
plaintive tune was played, was so delighted when a rattling dancing jig
was executed, he actually danced about in ecstacies of joy. The wolves,
foxes and hyenas could not be made to appreciate any of the tunes, but
the monkeys enjoyed all the tunes, if being sad when doleful tunes are
played give happiness, and they partook of the exhilaration when lively
sounds came from the instrument."

[Illustration: _Fig. 29. THE LION AND CUBS_]

The warm summer days were now at hand, and all realized that this was
the proper time to carry out the long-delayed project of fully exploring
the western shore of their little continent. This had been deferred
before John came, in order that more complete preparations could be
made, and to await settled weather, and now that he was here further
delay had been urged in the hope that memory would be restored and thus
give them an addition that could be depended on. One puzzling feature of
his malady was that he understood, in a measure, what was told him, but
it was noticed that whatever was spoken had to be accompanied by some
manual action. If told to get a pail of water, he would remain inactive
until a pail was taken up or pointed out. So in yoking up the yaks,
merely pointing at the yokes would be sufficient to start the lagging
memory. He quickly learned to manipulate the guns, and spent hours in
practicing by shooting at the target.

Singular as it may seem, he showed some intelligence at the good shots,
but all these flashes were momentary only, and it was further noticed
that he would remember an act performed the day before and repeat it in
precisely the same way. It was like an imitative process, and the
Professor suggested that he was now in the condition of a child,
learning all things anew, to which was added some glimpses of things he
had learned before.

A new wagon was necessary, as the one which had been used for the past
eight months was clumsy and badly worn. All took a part in this
important work, and it was here that the workmanlike qualities of John
showed themselves. He was a treasure in this respect. The lathe was a
pleasure to him, and so with bench work, and within ten days a new and
larger wagon was turned out.

"I only wish," said Harry, "that we could paint it up, and thus make a
real finished article out of it."

"Your idea is a good one, but in order to make a lead paint will take
too long a time to provide a carbonate which will answer the purpose."

"Why does it take so long?"

"We have plenty of lead, but to get the base for the paint it will be
necessary to cast a lot of thin gratings, and use earthen pots, partly
filled with vinegar. A layer of the lead gratings must then be put down
and the earthen pot stood on them and partly filled with acetic acid, or
vinegar. A board should cover each pot and spent tannin bark placed
around them. This must be built up in the form of a stack. Fermentation
soon sets in, and the result will be the formation of carbonic acid, and
in five or six weeks the metallic lead converted into what is called the
carbonate which may be washed and ground up with oil, and sold as the
white lead of commerce."

"Instead of that what should we use?"

"We have plenty of flax, as you know. From that we can make linseed oil,
and with a proper coloring matter, which is not necessary, however, we
can provide a paint that will be very serviceable."

"Then why not use the madder dye which we made for dyeing the flag?"

"Just the thing. In addition we must have a dryer of some kind. I
suggest that we distil some of the rosin, or the sap from the pitch pine
trees, for that purpose."

"What kind of product shall we obtain from that?"

"Turpentine."

Thus day after day passed in preparation, each hour, almost, suggesting
some new addition to their stock, which would contribute to protection,
comfort, or necessity. Among other things suggested, in order to relieve
them as much as possible from carrying such a large burden in the way of
provisions, was the making of synthetic foods.

George had this in mind for some days before he broached the subject to
the Professor. "I understood you to say that if we had synthetic foods
we could carry several weeks' rations about our persons, and the load
would not be a heavy or perceptible one at that? If such is the case,
why can't we prepare some of the food in that way as a matter of
precaution? What is the meaning of the word 'synthetic,' and how is such
food made?"

"The word is the direct opposite of 'analyses.' In analyzing, the
elements composing any substance are separated from each other. In
synthesis the different elements are put together to form the substance.
Thus, take water as an illustration: Its component parts are two parts
of hydrogen and one of oxygen. Knowing this to be the case, the chemist
takes that many parts of oxygen and hydrogen, and by uniting them water
is formed which is just as much a true water as though it fell from the
heavens or was taken from a well or spring."

We should not go far out of the way in stating that the Professor was
putting in some time in this direction, while the other work was going
on, and this was confirmed later on when he requested Harry to furnish a
number of small tubes like those used for the powder, and it was noticed
that a quantity of bamboo was taken to the laboratory and cut up into
short sections.

The guns and ammunition were now ready, a supply of food had been
prepared, and George insisted on baking a quantity of barley bread,
which was carefully wrapped up, so that it would not be dried out or be
liable to get wet. The wagon was admirably adapted for the purpose. The
wheels were not extraordinarily large, but they had wide treads, and the
body was high at the sides so as to serve as a fortress in case of
trouble. An extra yoke was taken, a supply of sugar and also of honey
put in the vessels which the cave supplied, and only a small store of
vegetables, as they depended on finding these en route.

The start was agreed upon for the following morning. Observation Hill
was visited, and a new inscription affixed to the pole, so that any
passing ship might know their plight, and be able to direct its course
to the west. The value of the chart made by the Professor was now
appreciated, as that was also tacked up in its proper place.

Jack and Jill were the yaks selected for the journey, as they were tried
and true, and had now grown to be strong and well domesticated. Freedom
was given to the cattle, and all the buildings closed up. This was done
to secure the interiors from intrusion on the part of animals. An
inscription was also placed on the door of the house.

Promptly at nine o'clock the company, consisting of the Professor,
Harry, George, John and Angel, started on the journey across Wonder
Island. This was their sixth trip, only one of them by sea.

Would this be any more successful than the preceding ones?



CHAPTER XVII

THE TRIP THROUGH THE DENSE FOREST


On the march up Cataract River, and out toward the forest, the same
order was observed as on the previous trips. One must lead the way, and
act as scout, while the others were to remain with the team. They did
not anticipate much difficulty during the first two or three days from
savages, but it was always well to have some one in the lead so as to
point out the most desirable paths, as it must be remembered they had to
make their own trails through a wilderness. Much of it had been
traveled, it is true, but there was nothing approaching such a thing as
a road, or even a path, by which they could be guided.

It was amusing to watch Angel, as he glided along from one tree to the
next, where the forests were in their paths. At other times he would be
in the wagon, or shamble along, and sometimes leap on the backs of the
yaks and ride there. The patient animals were so used to him that no
attention was paid to his antics, even though he occasionally sat on the
yoke between the animals.

John was an interested observer of all the preparations, and was one of
the first to take his place alongside of the wagon. When the Professor
urged him to take a seat he looked up inquiringly, but did not comply.
The Professor did not urge him, but after several hours of walking, he
was again asked to mount, and he did so, thereby seeming to understand
what was required of him.

When they camped at noon for the first meal, they were still on the
banks of the Cataract, but here it took a decided turn to the west; and
now the course for the afternoon must be to the southwest so the South
River could be reached above the falls.

That river was reached early in the afternoon, and they recognized the
trail formerly made on the first journey along its banks. The first
encampment for the night was probably twenty miles from home, but the
next morning, after they had struck into an entirely new section of the
island, the journey grew more burdensome, as the land on both sides of
the stream became rough, and in many places the small streams crossed
offered such steep sides that frequent detours had to be made to enable
the team to get across.

During the second day they did not, on account of this, cover more than
ten miles, and near the close of the day a second falls was reached,
showing that they were going up to a much higher altitude. Above the
falls the river turned abruptly to the south, and within five miles of
it the river forked, one branch going south and the other southwest.

They were on the branch going west, and that course was followed, but
still the country was rough, and now became thickly wooded, which added
to the discomfort of traveling with a team. Magnificent trees grew on
every side, and in most places sprang up clear to the water's edge.

"You have here a good illustration," remarked the Professor, "as to the
source of the debris which is found on the shores of the island. The
streams carry down the logs, trees and leaves, which, after being washed
out to sea, are finally left along the beaches."

Our voyagers had passed many nights in the forests before, but this was
the first time they had come across such impenetrable jungles. The large
trees were actually so close together at many places that the wagon had
to be backed and worked around for long distances to enable them to make
any forward movements.

Before noon of the third day it became so discouraging that they stopped
to consider the situation. Possibly a route away from the river would be
much better, and that course was decided on, so that the direction
agreed on was west, with a slight trend to the north.

The reason why the course along the river would be the most direct was
judged from the fact that the lights, which they saw from their boat,
made the location of the savages fully fifty miles or over from the
northernmost cape where they had been cast ashore a few weeks before.

The travel must, therefore, be to the southwest, and not to the west,
but at the rate they were going, with every hour more difficult, it was
hoped that the new course would in the end be quicker. All of that day
the struggle was a strenuous one, and when night came all were
exhausted, and were ready to retire as soon as the meal was over.

They were in the midst of the thickest forest, and up to this time all
had retired, as they did on this occasion. The yaks were enclosed in a
railing made of small trees, so as to protect them, and the two
mattresses within the covered body made comfortable beds for all.

Strange sounds occasionally disturbed them, but caused no particular
alarm, until Angel began to grow restless, about two in the morning.
George tried to quiet him, but he persisted in giving the alarm.
Suddenly a howl and a shriek awoke the occupants of the wagon and as
each arose he instinctively grasped a weapon. The sounds came from two
animals, one of which was close by; the other at a greater distance.

"The one near us seems to be a wildcat, or an animal which utters a
characteristic shriek of that kind, but I am not sure as to the identity
of the other animal," remarked the Professor, as he listened intently to
the hideous howls and shrieks.

It was pitch dark, so that it was impossible to recognize anything in
the wagon, and of course the dense forests only added to the gloom,
although the sky could be faintly seen directly above them through the
scraggly leaves. The Professor searched for one of the lanterns, when he
heard the yaks becoming uneasy, and running back and forth in the little
enclosure.

John was awake, and his eyes seemed to have a sort of glimmer as the
light flared up. The rear end of the wagon led directly into the pen
where the animals were, and no sooner had the light rays illuminated the
enclosure than a heavy object sprang from an adjoining tree and landed
on one of the yaks.

The latter was thrown across the pen with the impact of the force, and
the Professor, who had the lamp, could not level his gun, but without a
moment's hesitation John's gun was at his shoulder, and he fired before
either of the boys could recover themselves in the excitement.

The firing of the gun seemed to raise pandemonium. The sudden appearance
of the light, as the animal made the leap, disconcerted him, and the
shot following immediately, caused him to utter a terrific growl. John
grasped the Professor's gun and shot the second time, and the shot was
at blank range. The animal gave a slight spring forward, and fell across
a tree trunk which was at one side of the enclosure, and on which they
had arranged the cooking utensils the night before.

This was exciting enough for one night's adventure, but as John and the
boys were about to descend a crash in the trees to the right caused them
to halt. The Professor held out his light, but the thick wood and the
dense underbrush prevented any examination more than thirty or forty
feet beyond.

The eagerness of the boys to return to the wagon caused the Professor to
loose his grip on the lamp, and before he could recover the hold, it
fell to the ground and was extinguished. The yaks appeared to be in a
frenzy now, and the howling beyond increased in intensity. After a
search the lamp was relit, and the two others also brought out and
lighted, and the appearance of the light caused a hurried retreat of the
howling beasts.

"It is a puma," were the Professor's first words, "the most enormous
specimen I ever saw."

[Illustration: _Fig. 30. PUMA_]

"Well, these woods must be full of them, by the way they howled."

The yaks were calmed down after some effort, and it was found that the
shoulder of Jack had been lacerated by the claws of the puma, but beyond
that no damage was done. Both of John's shots had taken effect, and it
delighted the Professor to point to the wound and then indicate, as best
he could, how they owed him a debt for his skill.

The carcass was dragged out of the enclosure to keep the yaks quiet, and
when this was done they seemed relieved.

"I would like to know what the other animal was?"

"It is my opinion that it was a companion to this one. They, like all
animals, have a means for communicating their ideas to each other. Some
English scientists have found that the hen utters twenty-three distinct
notes, and that they convey different meanings. One single note,
differing from another, may convey the meaning of an entire sentence
uttered by man. The particular purring of a cat in one way means one
thing, and when emitted in a slightly altered tone indicates something
entirely different. Then, again, most animal sounds are accompanied by
some distinctive movement, as, for instance, the striking squeal of a
hen, accompanied by the crouching attitude, together indicate the
appearance of a hawk as plainly as though it uttered the warning in
words. It is obvious, therefore, that all the sounds made by animals,
such as cackling, clucking, crooning, purring, crowing, growling, and
roaring, as well as modifications of these sounds, impart some meaning
which can be distinguished by their kind, and are frequently recognized
by others."

This explanation appealed to George. "I know the moment Angel is
pleased, or when he is excited, and now that I think of it, I am sure
that he has several ways of expressing his meaning, and I am going to
try and see whether I can tell the difference hereafter when he tries to
talk."

There was little sleep that night, except on the part of John, who was
soon asleep. When morning broke they had an opportunity to examine the
dead animal. It had a uniform gray color, fading into a white in the
under part of its body, and with a very long, supple tail.

"The animal is sometimes called the panther, or 'painter,' as it is
familiarly known; and it is regarded by some authorities as the cougar.
It inhabits the whole of America. Its home is among the branches of
trees, and is a dangerous antagonist when wounded or cornered."

This incident made them desirous of quitting the forest by the nearest
route, but this was difficult to determine, as there were no elevated
hills in sight. In the forenoon of the third day, other animals were
sighted, and George, who was in the lead during the first part of the
trip, did not have the courage to go ahead very far, and soon after the
start was made, John came up and accompanied him, an act entirely
voluntary on his part, which increased the astonishment of them all.

It is impossible to account for these remarkable actions of the human
mind while in such a state. Did he realize the danger to his friends?
Who can answer the riddle?

But they must go on. The forest must be conquered. How far they had to
go was a mystery to them. One thing was certain: they were going toward
West River, but they were still less than half way. It would have been
the part of prudence to have taken the route to the north, through a
country which they had twice traversed, and which afforded far better
traveling, but it could not be helped now.

The fourth day did not improve their condition in the least. The dense
wood was on every side. The inclination of the ground was so slight as
to give no indication whether they had reached the summit of the
tableland, or were still ascending to a higher level.

In estimating the distance traveled in the four days it could not be
possible that they were over fifty miles from the Cataract. To add to
their perplexities, Jack began to walk with a perceptible limp. The
wound in the shoulder was inflamed, and a rest was necessary.

In this emergency a council was called, and the Professor suggested that
some of the party should conduct an exploring expedition on foot to the
west, going not to exceed five miles, and then return. But as it was too
near night to make the attempt at once, it was agreed that an early
start should be made in the morning.

The question now arose, who should go. Neither made a suggestion until
Harry ventured this opinion: "I am perfectly willing to take John with
me. I am sure he can be trusted. It will be imposing too much of a
burden on you," said he, looking at the Professor, "and I am active and
strong enough to stand the trip."

This suggestion was acted on, and early in the morning Harry took a
quantity of ammunition, and the Professor gave John a similar supply and
a couple of the guns, one of which was strapped to his back, similar to
the manner in which Harry was equipped. The attention of John was then
directed to the forest in the west, and as Harry moved away he followed
with a comprehensive glance that gave all of them the greatest relief.
Prior to their departure, the yak's wound was examined, and John saw
this as well, so that from all indications they would have no reason to
have fears on his account.

As usual, their bolos were taken along, and at intervals the trees were
blazed on both sides, this action being performed by John with a
regularity and precision that astonished Harry.

Traveling under those conditions was not conducive to speed, but they
were now trying to find what lay beyond them, and to learn, if possible,
how much farther the dense growth existed beyond them. They went on for
three hours or more, and still no change, and they stopped to rest.

Imagine yourself surrounded by these conditions. A companion who could
not talk, and who was, in all probability, demented, the eternal
silence, except as it would be occasionally startled into life by some
living thing; unable to even indicate his thoughts, or to consult with
him, as to direction, or to talk about the probabilities beyond them,
and you will feel that it took a brave heart to continue the journey.
But Harry possessed determination. He made up his mind to go on, until
he could find some news to take back, and so the quest continued for two
hours more.

But Harry had forgotten that they started without food, and that it
would take them as long to get back as they had already journeyed, and
it was now fully noon.

It seemed as though a hundred feet away it appeared clearer, but this
delusion had been repeated so often that he tired of it, and when, after
a rest, another start was made, he mentally made up his mind that if he
could not find a clearing within the next half hour they must return.

The clearing beyond did not deceive him this time. He clearly saw an
elevation beyond, and he almost shouted, but he did not stop and laugh
in his joy at the sight. John saw it and instinctively knew its meaning.
Then, motioning to him, he pointed back in the direction of the wagon,
and started to retrace his steps.

It was past noon, and Harry was hungry. John turned and followed and,
glancing at the sun, drew a small package from his coat, and handed
Harry several slices of barley bread. It affected him so much that he
could scarcely contain himself, and he could not help putting his arm
about him and indicate that his forethought and kind act was
appreciated, and John looked at Harry inquiringly, and proceeded to eat
his luncheon.

Judging the time which had elapsed since the start in the morning, it
would take them fully five hours to retrace their steps, as the glazed
trees showed them the way readily, and they could, therefore, make the
trip in less than six hours consumed up to this time, so that they would
be back before six in the evening, but they had found the outlet, and
determination had won.

The passage back through the forest was made with a happy heart, and
after they had gone two hours, John suddenly stopped, and grasped Harry
by the arm as he peered forward. Harry heard something before them.
Crackling leaves, and finally voices, were distinguished. They thought
the team must be miles away. John moved forward fully fifty feet, and
Harry followed. Soon the wagon top came in sight, and Harry bounded
along the blazed trail, with a cry, of relief.

Jack's lacerated shoulder was not as bad as had been anticipated, and
toward noon the lameness was not so perceptible, so that, in order to
save time, it was concluded to follow the blazed path, which could be
made out easily, thus bringing them together fully three hours earlier
than Harry had anticipated.

Harry explained what had been seen to the west, and that three or four
hours more of hard travel would bring them to an open country which, in
all probability, led to the West River.

All was eagerness now, and they pressed forward, hoping to be able to
reach the open country before night set in.



CHAPTER XVIII

SEEING THE FIRST SAVAGES


George's patience in teaching Angel was most commendable. Hours were
devoted to this work. Even before leaving home the animal would
recognize certain sounds, and performed many acts at the word of
command. Such words as "come," "go," "take this," and others usually
employed, were fully comprehended, and the names of Harry and the
Professor were understood.

Frequent tests were made by George and the Professor, acting in concert,
as this phase of the education greatly interested the latter, to
ascertain whether the orang performed the services from an understanding
of the meaning of the words, or whether it proceeded merely from the
constant repetitions of the words and acts conjointly.

The value of this proceeding will be made apparent to the reader as we
proceed in this history; but when they were educating Angel the idea of
utilizing his future services, in a critical time, did not occur to
them.

They camped for the night at the end of the trail; and now they hoped
that the morrow would open the route over a more comfortable path than
the last three days had offered them. Before going an hour on the way, a
campfire was found, which evidently had been used not many days before.

There had not been any rains in their section of the country for ten
days previous to this, and it was obvious that no rain had fallen on the
ashes of this fire. From this it must be inferred that whoever made the
fire must have been there recently.

The utmost vigilance would be necessary, in view of this discovery. The
wagon moved forward slowly. Every part of the country within the limits
of the trail was under scrutiny, and every sound and moving object fully
investigated before proceeding. This made travel necessarily slow. The
underbrush was very thick, and but few trees remained, and those were
scattered, mostly in clumps or in detached groups.

Harry looked at the tall trees longingly many times, and the Professor
divined his meaning. "I have a notion to try prospecting from one of
these trees. We can, no doubt, see more from them than we can learn in a
day's travel. But trees of that kind are pretty hard to climb."

"It might be done with a climbing ring," answered the Professor.

"What is that?"

"The cocoanut hunters and others put a hoop around a tree, and then get
inside of the hoop, with the back against the hoop, so that the feet can
get a purchase against the tree, and in that way the trees are scaled
with the greatest agility."

"Well, if the savages can do it, I can."

"It might be well to make the trial, as even thirty or forty feet would
give a fair view of the country. Before making the hoop we should select
a tree most suitable for observation."

An oak tree with a bare trunk up to the first large limb was finally
selected. The diameter was fully two feet at the base.

"With a tree of this size the hoop should be about three and a half feet
in diameter."

"What material shall we make it out of?"

"If we can find a small hickory sapling it will be the most serviceable,
because its natural strength and stiffness will permit us to use a small
and light pole."

A search was made, and after a time several were cut and brought to the
tree. The thick end of the sapling was cut or pared off along one side
so it would bend in the direction of the slice, and this was put about
the tree and the ends brought together and lapped. Thongs were then used
to splice the lapped ends, and small nails driven in at intervals to
assure security.

The use of hoops of this kind requires practice, and the natives use
their bare feet against the tree, which prevents slipping. Harry,
however, had shoes; not a very good thing to use against the bark, and
after numerous trials both boys found the task a trying one. Their bare
feet were too tender to use against the rough bark, and as a last resort
one of the old pair of shoes was brought out, and studded with nails.

The climber gets inside the hoop, with the latter around the tree, and
resting against the small of the back, or a little higher up. The feet
are then braced against the tree, and the hoop grasped by both hands. In
climbing the body is suddenly moved toward the tree, and this motion
temporarily releases the outward pressure against the hoop, and at the
same moment the hoop is moved upwardly about a foot. One or both feet
then make an upward step, and this process is repeated.

More than an hour was occupied in learning to manipulate the hoop, so as
to progress upwardly, and at the end of that time Harry made a slow and
careful ascent to the first limb, a distance of thirty feet, stopping at
intervals, as he made his way up, to view the ever-increasing landscape,
and to take the needed rest.

"Do you see anything, Harry?" was George's eager questioning, as he
moved upwardly.

"Nothing yet," was the invariable reply. When the first limb was reached
he seated himself, and had an opportunity to view the surroundings from
a far better vantage point.

"Can you see the river?" was the Professor's inquiry.

"It is too hazy to make out anything there. It is clearer to the south."

"What can you see to the southwest?"

Harry scanned the country in that direction for some time before
replying. "All I can see there are trees, trees, just like the forest we
have been going through; but directly west of us we would have
comparatively easy traveling. The forest seems to extend southwest, and
we have been traveling through it at an angle. If I could get higher I
might have a better view."

He ascended fifteen feet higher, but even at that point the forest hid
the view to the southwest.

"From your examination I judge our only hope is to reach the river and
travel down its banks?"

"Yes; because we don't want any more of the forest with the team."

"Before we go, let us take off the hoop; I want to use it again." And
Harry unwrapped the thongs and disengaged it from the tree.

After luncheon the marching was resumed, this time due west to the
river. The trip during the day told on Jack, and a halt, was called
before they had gone five miles. Harry and John took their guns and
started south on a tour of investigation, making their way toward a
slight elevation which he had noticed from the observation point.

It was really a hill, covered with trees, and gave the appearance, from
the tree top, as being a continuation of the forest range. This was good
news to carry back. While passing through the tallest of the trees,
Harry, who was ahead, felt himself suddenly grasped, and he uttered a
scream.

John rushed forward just as Harry saw the repulsive form of a huge snake
which had wound itself around him. Harry was absolutely helpless in the
folds of the serpent. John's quick eye took in the situation at once,
and by the time he reached Harry the bolo was in his hand and poised.
With a single stroke the body of the snake was severed above the last
coil, and the portion suspended from the tree fell alongside of the
combatants, and John's hands reached out to assist Harry.

[Illustration: _"With a single stroke the body of the snake was severed
above the last coil"_]

Harry was frightened so that he could hardly utter a word, and after
some exertion he disentangled himself and gazed on the immense serpent.
When he had recovered partially he was too much excited to proceed, and
they returned to the camp with a story of the attack and the noble
rescue on the part of John.

George's excitement was at fever heat. "We must get his skin." Harry was
willing, because a trophy of that kind was worth preserving. The team
was taken along, as it was fully a half mile from the camp. When the
Professor saw the serpent he congratulated Harry on his escape, who, but
for the fortunate presence of John, would have been killed.

It measured twenty-two feet in length and its greatest diameter was
eight inches.

"What is this--the boa constrictor?"

"It belongs to the same family, but is known as the anaconda."

"What is the difference between the boa constrictor and the python?"

"The boas are the species found in the western hemisphere, whereas the
pythons inhabit the eastern countries. The anaconda is a native of
Brazil and some of the other South American countries. They are
non-poisonous, and depend for securing prey on their wonderful swiftness
and in the tremendous power which they exert when the victims are in
their grasp."

As usual, George had been prospecting also, and when the skin had been
removed and the excitement died away, he exhibited a peculiar fruit. It
was the shape and size of a pear, but had a peculiar kidney-shaped
pendant at its large end.

The Professor smiled when he saw it. "You have the fruit of the
Anacardium, or cashew tree. That is, it is a combined fruit and nut."

"Is this little projecting part a nut?"

"Yes; and this evening we can try some of them; but they must be
roasted. The fruit can be eaten as it is, but it is like the persimmon;
it must be fully ripe, or it will be too astringent. It is a fine
medicine, and the sap of the tree produces a product like gum arabic,
and is known in commerce as acajou."

[Illustration: _Fig. 31. Acajou._]

The elevation which Harry was anxious to gain was before them, less than
a mile, and as it was not more than four in the afternoon, the team was
driven forward and the slight ascent begun. In a half hour the summit
was reached. It was not at a great elevation, but the incline was a
gradual one, and it was hoped that from the elevated portion a better
glimpse could be obtained than the tree afforded.

It was too late when they reached the camping place to attempt any
observations that night, but in the morning an investigation was made to
find a tree of sufficient size to afford a good view. When it was
finally found the hoop was again brought out and Harry slowly made his
way upwardly, and those below waited in suspense for news.

He made a deliberate survey, and called down: "I can see the West River,
and directly to the southwest are white objects, but so far away that I
cannot tell what they are. They may be tents or huts, or something of
that kind. I couldn't say positively."

"Do the objects appear to be at or near the river?" asked the Professor.

"It is difficult to say whether the river goes in that direction. I can
see glimpses of the stream only here and there."

"Do you see any mountains to the south?"

"None whatever. Everything merges into a haze beyond the white objects I
referred to."

"It is probable," said the Professor, "we have located them, as I find,
from an examination of the sailing chart, that the village is located at
about that point. I think our course should now be directed to the
river, as traveling will be better near its shores, and we would, I
think, be more likely to meet some of the inhabitants along the shore
than in the dense interior."

The low mountain range beyond the West River was plainly visible from
the elevation. The Professor noted how its lower end sloped down, and he
knew their location beyond question, and explained that they were now
practically due east of the point where they were compelled, on the
tempestuous night, to turn back to the north.

It was a long, weary night for them, because expectation ran high. They
were anxious, and yet dreaded the meeting, but they had sought it and
could not go back now. No fires were kindled that night, although George
had counted on some of the roast nuts. It would not be safe to hazard a
light.

The utmost vigilance was now to be the watchword. There must be no
firing of guns or wandering from the camp on the part of either. At the
time the wagon was constructed the Professor had an eye to its use as a
means of defense, which was explained to the boys, and this offered a
great sense of security to them.

The sides had been made high with this end in view, and not for the
purpose of hauling big loads. If attacked in the open, it would serve as
a fort, and would enable them to move around from one side, or end, to
the other without being exposed. In anticipation all the guns were
examined and the ammunition placed within reach and conveniently
arranged for any emergency.

The provisions were also arranged to prepare for a siege if necessary.
During that evening the Professor for the first time explained in detail
how the natives would be approached.

"I think it is well, now that we are about to come in contact with the
people here, to be prepared to meet them in the proper way, so as to
insure safety to ourselves. It is likely that we shall have to treat
with the natives, and thus come to some understanding, before we entrust
ourselves to their mercy. Above all things, we want to impress on them
the feeling that we are not antagonistic and have no hostile intentions.
We are unfortunate in not knowing the character of the dwellers on the
island. They may have had frequent contact with the outside world. That
may, or it may not, mitigate our lot. So we cannot count on that factor
too much. If they are low down in the scale of humanity, we may find a
still harder problem. In any event, however, this must be made plain.
The wagon is our fort. From that we can defy them, unless they have
firearms.

"From this time on let us keep together----"

Something unusual stirred beyond. The crackling of twigs was plainly
recognized, and the mumbling sound of voices could be made out. They
were human voices, but their intonations, as they came nearer, were
sufficient to show that the language was not that of civilized people.
They were more in the nature of successive grunts, not much more
definable than the noises of animals.

They were wrought up to the highest tension, and the only fear was that
either Angel or the yaks would make some noise which might attract the
passers-by. To their great relief the sounds died away. This visit would
have been welcomed during the daytime, but at night they could not
afford to take any risks.

This incident showed they were now in an enemy's country. The river was
fully ten miles to the west of them. How far the encampment or village
of the inhabitants was to the south they could only imperfectly
estimate, but it was certainly twenty miles or more.

What they longed for at this stage more than anything else was the open
country. The proximity of the river would likely be the better place for
them, so early the next morning the team was gotten ready, and before
starting, the Professor made a survey of the surroundings in the
direction that their visitors had gone.

At several places were indications of tracks, and these were followed,
the team coming along behind. Everything was covered with leaves where
the trees abounded, and in the more open areas the grass was so well
advanced that it was difficult to distinguish tracks in the earth, but
the broken-down grass plainly showed their trail, leading to the south.

Aside from that, nothing could be gathered to give any indications until
they had proceeded over a mile, when a small rivulet, the first they had
noticed since leaving West River, crossed their route. The Professor
actually bounded forward at the sight and examined the footprints. The
marks of bare feet were visible where they crossed, and they were of
abnormal size.

After a careful examination, the Professor said: "There must have been
at least a half dozen of them, judging by the different prints. See,
this one has a deformed foot, or the big toe is missing; and this one
must be a large man, judging from the deep impression made." Beyond the
vicinity of the stream all footprints were again lost.

"As we are now likely to have an open country until we reach the river,
we can make more extended observations from the top of the wagon, and
one should be there constantly to notice any signs on either side."

They were within five miles of the river, and George, who occupied the
post of lookout on the top bow of the wagon, called out excitedly: "I
can see them; there must be a dozen or more." The wagon stopped, and the
Professor and Harry hurriedly scrambled to the top. John saw the
movement and seemed to understand, for he also crawled up and looked
across the rolling landscape to the southwest.

In the distance were unmistakable movements of beings moving to and fro.
They were distant at least two miles, and there was no evidence, from
the character of their movements, that anything unusual had occurred,
and it might therefore be inferred that the wagon had not yet been
discovered.

At last they had come up to the people who occupied such a large share
of their speculations during the past year, and in "THE TRIBESMEN" are
set forth the meeting of the savages and the hostile manner in which they
were received, together with some of the things which really show why the
land they lived in might justly be called "Wonder Island."

THE END



       *       *       *       *       *



GLOSSARY OF WORDS USED IN TEXT


    Alloy.           A combination of two or more metals.

    Actinic.         Photographic rays. Those vibrations above the
                     vibrations which produce violet.

    Acutely.         To the point. Being keen.

    Allied.          Attached to; bound to; an arrangement with.

    Alienation.      To cause to turn away; to make indifferent.

    Amplitude.       Scope; reach; breadth; fullness.

    Antiquated.      Adapted to the uses or customs of olden times.

    Animation.       Possessing animal life; sparkling; lively.

    Antagonistic.    Against; opposed.

    Agility.         Quick; sprightly.

    Assumption.      Taking it for granted.

    Bacteria.        A microscopic microbe, very minute, widely
                     distributed in all matter.

    Betokened.       To give promise or evidence of; presage; indicate.

    Bestowed.        To confer as a gift; to give freely as a gift.

    Buccaneer.       A pirate or freebooter.

    Bullion.         Gold or silver in mass, usually in convenient bar.

    Calcareous.      Impregnated with lime, or largely composed of it.

    Cardinal.        Of prime or special importance.

    Caulking.        The process of filling the seams of vessels.

    Cavities.        Holes; depressed portions.

    Carbonate.       To impregnate or charge with carbonic acid.

    Calcium.         Lime.

    Canopied.        A covering. Usually a conical top.

    Centrifugal.     Directed or tending away from the center.

    Characterize.    To delineate or set forth in a particular way.

    Consistently.    Standing together or in agreement.

    Convolute.       Rolled one part on another or inward from one side.

    Coefficient.     A number or letter put before an algebraic
                     expression, to show that one is to be divided by the
                     other.

    Constant.        That which is permanent or invariable.

    Convex.          Bulging outwardly; raised.

    Conducive.       Helping; tending toward.

    Contingency.     The awaiting of an event; in the event of.

    Compounding.     Made up of two or more substances.

    Contracted.      Made smaller; reduced in size.

    Combustion.      Being consumed. Disintegration.

    Contemplated.    To consider thoughtfully; to look at attentively.

    Caucasian.       Of, pertaining to, or characteristic of the white
                     race of mankind.

    Consistency.     Harmonious; not contradictory.

    Clarified.       Made clear; not turbid or cloudy.

    Crucial.         Decisive as between views or theories. Testing.

    Cylindrical.     A barrel-shaped body.

    Decoration.      To adorn with something ornamental.

    Debris.          Accumulation of material.

    Defect.          Something short; not perfect.

    Density.         Closeness of parts.

    Delver.          One who searches into things.

    Demeanor.        Appearance; manner; action.

    Domesticated.    To bring under the control of man.

    Delusion.        The state of being deceived or led astray.

    Dilapidated.     Torn up; fallen into decay; gone to ruin.

    Discrimination.  Ability to select; to judge; to be able to pick out.

    Deranged.        A disordered mind.

    Deportment.      Manner of acting.

    Dextrous.        Skilful; quick; adroit.

    Designations.    A distinctive mark or appellation.

    Depressed.       Lowered; made unhappy or unspirited.

    Determination.   Insistence; firmness; fixed purpose.

    Decomposition.   The act or process of separating anything.

    Dimensions.      The measurements; sizes.

    Dilemma.         A perplexing case to decide.

    Duplicated.      Made in a similar manner.

    Duct.            An opening, hole, or conveyor.

    Ductility.       Capable of being drawn out.

    Effective.       Fit for a destined purpose; a striking impression.

    Emergency.       An unexpected happening calling for immediate
                     action.

    Emaciated.       Greatly reduced in flesh.

    Entranced.       To put into a state of ecstacy.

    Ensue.           That which follows; to go after.

    Enraptured.      Overpowered with emotion.

    Entablature.     The uppermost member held in place by columns.

    Episode.         A particular occurrence.

    Essential.       The particular thing; the important element.

    Estuary.         The portion at the mouth of a river where it
                     discharges into another body of water.

    Exhilaration.    Lively, pleasing or enlivening sensation.

    Extracted.       To take from. Taken out of.

    Facial.          Pertaining to the face.

    Facility.        Doing with ease.

    Fascination.     A resistible influence. A pleasing impulse.

    Fathom.          To find out; depth; penetration.

    Fermentation.    A chemical condition where germs are developed and
                     grow in a substance and change the elements
                     comprising it.

    Feasible.        Easy to accomplish; that which is practical.

    Fiber.           A structure composed of filaments, like a vegetable
                     stalk.

    Formation.       The manner in which articles or substances are built
                     up.

    Fracture.        A break or crack.

    Fraternity.      A body of persons held together by some common tie.

    Fusing.          To melt by heat.

    Fumigating.      To treat by means of gases.

    Fulcrum.         The support against which a lever rests.

    Granulating.     To form into small grains or particles.

    Grotto.          A small cavern or cavern-like apartment.

    Gruesome.        Suggesting gloomy or frightful thoughts.

    Gunwale.         The upper portion of the hull of a ship or boat.

    Horizontal.      At right angles to a line directed to the center of
                     the earth.

    Hypnotized.      A treatment which acts directly on the mind or
                     nervous system.

    Impervious.      Permitting no passage through or into.

    Immoderately.    More than the usual; more than the ordinary.

    Instructively.   Along educational lines; learning things.

    Intonation.      The modulation of the voice.

    Inactive.        Not vigorous.

    Intestines.      That part of the digestive tube below the stomach.

    Intimation.      A hint.

    Intruder.        To enter or appear when not wanted.

    Inscription.     A writing; an announcement.

    Inevitable.      Anything which is bound to happen. A result.

    Insulated.       Shielded from something.

    Interim.         In the meantime. Within certain periods.

    Incidence.       Happening at the same time. A circumstance.

    Interpret.       To make plain. To bring to an understanding.

    Ingenuity.       To devise; to bring forward out of the ordinary.

    Inordinately.    More than the ordinary course or manner.

    Indicate.        To show, or to point out.

    Intensity.       With full vigor; strong; vivacious.

    Inverted.        Upside down. Turned about.

    Insistent.       To continue urging; determination.

    Involuntary.     Without intent; in spite of all precaution.

    Inefficient.     Not careful or prudent; without full capacity.

    Jubilant.        Joyous.

    Laboriously.     Consistently carrying out work without regard to the
                     amount of labor required.

    Lacerated.       To injure or to tear the flesh.

    Lee.             The side or direction opposite to that from which
                     the wind comes.

    Malady.          Sickness. Particular kind of illness.

    Manipulate.      The manner of handling. To artfully influence the
                     result.

    Manifestation.   Made known; acknowledged; understood.

    Maneuvered.      To make methodical change of position.

    Maritime.        Pertaining to the sea, or to naval affairs.

    Mercury.         A silver-white metallic metal in a liquid state.

    Minimizing.      The smallest state. In the least difficult position.

    Misgiving.       A feeling of doubt or apprehension.

    Miniature.       Small; a little copy.

    Momentum.        The power of overcoming resistance possessed by a
                     body.

    Mobility.        The capacity to change or alter.

    Monopoly.        Possessed of complete power. Full sway.

    Nitrogenous.     Partaking of the qualities of nitrogen.

    Normal.          A perpendicular; according to an established law or
                     principle.

    Obliquely.       A deviation from the direct line.

    Octagonal.       Eight-sided.

    Orbit.           The course in which a planet travels.

    Orifice.         A hole; an opening.

    Orgy.            Wild or wanton revelry.

    Ozone.           An allotropic condition of oxygen. A substance made
                     from oxygen.

    Pandemonium.     A fiendish or riotous uproar.

    Paleontologist.  A student in the origin of life on the globe.

    Patriarch.       The elder; the one in a tribe on whom authority
                     vests.

    Pathetically.    In a vein of sadness; arousing tender emotions.

    Parallel.        On a line with; side by side the same distance.

    Paralyzed.       Loss of power to control the muscles or other parts
                     of the body.

    Penetrate.       To go into.

    Perforation.     To make an opening or hole.

    Periodical.      At regular intervals.

    Peaty.           Having the characteristics of peat.

    Personified.     To transform from a thought or speech into a person.

    Perturbed.       To be disturbed in mind.

    Perceptible.     Noticeable; seen.

    Phenomena.       Something directly observable; anything visible.

    Primitive.       The first way of doing things; the original plan or
                     method.

    Prospecting.     Investigating; trying to discover new elements or
                     substances.

    Profusion.       Many; an abundance.

    Port.            A haven. The left side of a vessel.

    Proportionally.  Relative magnitude, number or degree.

    Predominating.   Overshadowing; possessing power.

    Properties.      The elementary substances of any material.

    Propagate.       To bring to a better condition or state. Making an
                     improved breed or type of animals or plants.

    Prognosticate.   To foretell.

    Promulgate.      To announce; to give out.

    Privation.       Hardship. To be kept from the necessaries of life.

    Promontory.      A high point of land extending out into the sea.

    Progenitor.      An ancestor in the direct line.

    Proximity.       Close to; in the neighborhood of.

    Radiating.       To emit or send out rays.

    Relaxation.      A change from the ordinary routine.

    Retarding.       Holding back; making the object go slower.

    Reticent.        Habitually keeping quiet or in reserve.

    Regulation.      In accordance with some law or order established.

    Refraction.      That property in light which causes a bend as the
                     ray passes from one substance through another.

    Reverse.         In the opposite direction.

    Rifling.         Spiral grooves in the bore of a gun.

    Rotation.        Turning; moving around a common center.

    Seepage.         Leaking; passing through.

    Sequence.        That which follows as the result of a certain thing.

    Secluded.        Kept hidden; not exposed.

    Spherical.       Round like a globe.

    Spiral.          Having the twist of a corkscrew.

    Spawning.        The period when fish lay their eggs.

    Stringers.       The longitudinal pieces which form the main frame
                     of a structure.

    Standard.        A post. Also the flag or ensign of a country.

    Strata.          Parts of layers of earth, rock, or other material.

    Strenuous.       Vigorous; insistent.

    Suppressing.     Trying to keep out of sight; hidden.

    Substitute.      In place of.

    Sulphide.        A compound of sulphur with another element.

    Subsided.        To stop; to proceed no further.

    Symptoms.        Indications; showing effects of certain illness or
                     treatment.

    Synthesis.       The putting of different things together.

    Theorist.        One who speculates; one who tries to arrange facts
                     to harmonize.

    Timbre.          The peculiarity of a sound whereby it is
                     distinguished from another.

    Tortuous.        Moving in a winding or irregular way.

    Tourmaline.      One of the gems, found in various colors.

    Traverse.        Across; traveling; to go over.

    Triangulation.   The method of surveying whereby two known points
                     are used to find a third, by means of the angles
                     made.

    Utilitarian.     One who tries to take advantage of any knowledge and
                     make use of it.

    Untenable.       Without good ground.

    Vacuum.          A space entirely devoid of matter.

    Veered.          Turned aside or in a different direction.

    Veritable.       Truthful; well known to be correct.

    Vibration.       Any movement which is more or less irregular and
                     continuous.

    Vividly.         Distinctly seen; brightly appearing.

    Wrench.          To twist violently. To injure by a forcible turn or
                     movement.



       *       *       *       *       *



Other books from

THE NEW YORK BOOK COMPANY
147 Fourth Avenue
New York



THE WONDER ISLAND BOYS

By ROGER T. FINLAY


A new series of books, each complete in itself, relating the remarkable
experiences of two boys and a man, who are cast upon an island in the
South Seas with absolutely nothing but the clothing they wore. By the
exercise of their ingenuity they succeed in fashioning clothing, tools
and weapons and not only do they train nature's forces to work for them
but they subdue and finally civilize neighboring savage tribes. The
books contain two thousand items of interest that every boy ought to
know.

    THE WONDER ISLAND BOYS
    The Castaways

    THE WONDER ISLAND BOYS
    Exploring the Island

    THE WONDER ISLAND BOYS
    The Mysteries of the Caverns

    THE WONDER ISLAND BOYS
    The Tribesmen

    THE WONDER ISLAND BOYS
    The Capture and Pursuit

    THE WONDER ISLAND BOYS
    The Conquest of the Savages

    THE WONDER ISLAND BOYS
    Adventures on Strange Islands

    THE WONDER ISLAND BOYS
    Treasures of the Islands



THE "HOW-TO-DO-IT" BOOKS

BY J. S. ZERBE


CARPENTRY FOR BOYS

A book which treats, in a most practical and fascinating manner all
subjects pertaining to the "King of Trades"; showing the care and use of
tools; drawing; designing, and the laying out of work; the principles
involved in the building of various kinds of structures, and the
rudiments of architecture. It contains over two hundred and fifty
illustrations made especially for this work, and includes also a
complete glossary of the technical terms used in the art. The most
comprehensive volume on this subject ever published for boys.


ELECTRICITY FOR BOYS

The author has adopted the unique plan of setting forth the fundamental
principles in each phase of the science, and practically applying the
work in the successive stages. It shows how the knowledge has been
developed, and the reasons for the various phenomena, without using
technical words so as to bring it within the compass of every boy. It
has a complete glossary of terms, and is illustrated with two hundred
original drawings.


PRACTICAL MECHANICS FOR BOYS

This book takes the beginner through a comprehensive series of practical
shop work, in which the uses of tools, and the structure and handling of
shop machinery are set forth; how they are utilized to perform the work,
and the manner in which all dimensional work is carried out. Every
subject is illustrated, and model building explained. It contains a
glossary which comprises a new system of cross references, a feature
that will prove a welcome departure in explaining subjects. Fully
illustrated.



THE BOY GLOBE TROTTERS

By ELBERT FISHER


This is a series of four books relating the adventures of two boys, who
make a trip around the world, working their way as they go. They meet
with various peoples having strange habits and customs, and their
adventures form a medium for the introduction of much instructive matter
relative to the character and industries of the cities and countries
through which they pass. A description is given of the native sports of
boys in each of the foreign countries through which they travel. The
books are illustrated by decorative head and end pieces for each
chapter, there being 36 original drawings in each book, all by the
author, and four striking halftones.

1. From New York to the Golden Gate, takes in many of the principal
points between New York and California, and contains a highly
entertaining narrative of the boys' experiences overland and not a
little useful information.

2. From San Francisco to Japan, relates the experiences of the two boys
at the Panama Exposition, and subsequently their journeyings to Hawaii,
Samoa and Japan. The greater portion of their time is spent at sea, and
a large amount of interesting information appears throughout the text.

3. From Tokio to Bombay. This book covers their interesting experiences
in Japan, followed by sea voyages to the Philippines, Hong-kong and
finally to India. Their experiences with the natives cover a field
seldom touched upon in juvenile publications, as it relates to the great
Hyderabad region of South India.

4. From India to the War Zone, describes their trip toward the Persian
Gulf. They go by way of the River Euphrates and pass the supposed site
of the Garden of Eden, and manage to connect themselves with a caravan
through the Great Syrian Desert. After traversing the Holy Land, where
they visit the Dead Sea, they arrive at the Mediterranean port of Joppa,
and their experiences thereafter within the war zone are fully
described.



The Ethel Morton Books

By MABELL S. C. SMITH

This series strikes a new note in the publication of books for girls.
Fascinating descriptions of the travels and amusing experiences of our
young friends are combined with a fund of information relating their
accomplishment of things every girl wishes to know.

In reading the books a girl becomes acquainted with many of the
entertaining features of handcraft, elements of cooking, also of
swimming, boating and similar pastimes. This information is so imparted
as to hold the interest throughout. Many of the subjects treated are
illustrated by halftones and line engravings throughout the text.

    Ethel Morton at Chautauqua

    Ethel Morton and the Christmas Ship

    Ethel Morton's Holidays

    Ethel Morton at Rose House

    Ethel Morton's Enterprise

    Ethel Morton at Sweet Brier Lodge



THE HICKORY RIDGE BOY SCOUTS

A SERIES OF BOOKS FOR BOYS

By Capt. Alan Douglas, Scout-master


  I. The Campfires of the Wolf Patrol

     Their first camping experience affords the scouts splendid
     opportunities to use their recently acquired knowledge in a
     practical way. Elmer Chenoweth, a lad from the northwest woods,
     astonishes everyone by his familiarity with camp life. A clean,
     wholesome story every boy should read.

 II. Woodcraft; or, How a Patrol Leader Made Good

     This tale presents many stirring situations in which the boys are
     called upon to exercise ingenuity and unselfishness. A story filled
     with healthful excitement.

III. Pathfinder; or, The Missing Tenderfoot

     Some mysteries are cleared up in a most unexpected way, greatly to
     the credit of our young friends. A variety of incidents follow
     fast, one after the other.

 IV. Fast Nine; or, a Challenge from Fairfield

     They show the same team-work here as when in camp. The description
     of the final game with the team of a rival town, and the outcome
     thereof, form a stirring narrative. One of the best baseball
     stories of recent years.

  V. Great Hike; or, The Pride of The Khaki Troop

     After weeks of preparation the scouts start out on their greatest
     undertaking. Their march takes them far from home, and the
     good-natured rivalry of the different patrols furnishes many
     interesting and amusing situations.

 VI. Endurance Test; or, How Clear Grit Won the Day

     Few stories "get" us more than illustrations of pluck in the face
     of apparent failure. Our heroes show the stuff they are made of and
     surprise their most ardent admirers. One of the best stories
     Captain Douglas has written.

VII. Under Canvas; or, The Hunt for the Cartaret Ghost

     It was hard to disbelieve the evidence of their eyes but the boys
     by the exercise of common-sense solved a mystery which had long
     puzzled older heads.

VIII. Storm-bound; or, a Vacation Among the Snow Drifts

     The boys start out on the wrong track, but their scout training
     comes to the rescue and their experience proves beneficial to all
     concerned.



Boy Scout Nature Lore to be Found in The Hickory Ridge Boy Scout Series,
all illustrated:--

    Wild Animals of the United States--Tracking

    Trees and Wild Flowers of the United States

    Reptiles of the United States

    Fishes of the United States

    Insects of the United States and Birds of the United States.





*** End of this LibraryBlog Digital Book "The Wonder Island Boys: The Mysteries of the Caverns" ***

Copyright 2023 LibraryBlog. All rights reserved.