THE SEA SERPENT.—Page 347.
I have enough on hand, at the time of writing this, to prove to any one that I have both seen and captured the veritable sea serpent; for, as I sit in the Hermitage, the whole skull, with jaws, teeth, and part of the vertebræ attached, is hung up near me, and below it a circular piece, nearly four feet long, of the hide of the animal at its greatest girth. The frontal bone of the skull, which is not very thick, is broken where the harpoon iron entered and caused immediate death. With this exception the whole specimen is in complete order; and I have also a sketch of the animal drawn upon parchment, from actual life, taken by myself before he was at all mutilated or cut up.
I hope that this truthful, consistent, and convincing recital will close forever this mooted question; for there is a sea serpent, and I have been able to capture and preserve one of his species.
CHAPTER XXIX.
Make a Balloon and Flying Machine, in which I make a Successful Ascension.
My thoughts turned wholly now upon means of defending my vast treasures in case of invasion, and devising ways of escape from the island. As to the former, I overhauled all my artillery at the different points, increased my stock of gunpowder, and had each cannon well supplied with ammunition. I also perfected my battery at Stillwater Cove, and kept the armament on the walls of the Hermitage in excellent order. Not content with this, I went to work in the foundry and turned out several cylinders, similar to the one I had exploded the sunken wreck with, which I fitted with flint and steel, ready to be filled with powder; in short, a species of torpedo, which I had fully determined to take into the submarine boat and explode beneath the bottom of any hostile vessel that should dare to attack me, so much had the acquisition of vast riches changed my disposition. I felt that any vessel approaching and anchoring would be at my mercy; for in the night-time I could approach her, wherever she might be anchored, unknown to anyone, and, attaching one of my infernal machines, send her to the bottom with all on board. I do not say that I should have done this, but I was prepared for all emergencies, and determined to defend my treasure to the last. For means of escape I turned my attention to ballooning,—a subject which I had thought much about, but heretofore had done nothing in that direction. For several years I had been quietly gathering in all the dried pods of milkweed, floss, or silk that I could find,—and large spaces of the island were covered with it,—determined at some time to weave me some kind of cloth or silk from its fibre. I now commenced seriously upon this work, and took hold of it in earnest. It would take too long to relate how many changes I had to make in my loom, which I built of cast-iron, to be moved by water-power, before I could get it to work at all; but I had the theory all correct, and it was only practice that I needed to make cloth. The machine for spinning the floss into threads took me the longest time, but I finally accomplished it. After a while, and with many failures, I commenced to turn out from my loom a sort of cloth, about a yard wide, which was very strong, flexible, and light, but of an uneven surface, on account of the irregularity in the size of my threads, and fuzzy, like coarse flannel; but for strength and practical use I found the material all that could be desired; and, having tested it, I set carding and spinning wheels to work daily to procure thread for my loom. After making some hundred yards of this cloth, I stopped all the operations to experiment in another direction. In my boyhood I had seen balloon-ascensions made by filling the bag with a gas, created by pouring sulphuric acid upon iron or steel filings in this manner: Several old hogsheads were brought upon the field where the ascension was to take place, and into each of them was poured a quantity of iron filings, scraps, etc., and upon this was poured sulphuric acid; the casks were then headed up, and through a small orifice the gas engendered was led by a pipe from each to the balloon, which was thus inflated. If I could make this gas and successfully inflate a small balloon, it would then be time enough for me to advance with my clothmaking for a large one. I easily ascertained from my book how to make sulphuric acid. And this is how I did it: I got together a quantity of sulphur or brimstone, and setting fire to it in a closed vessel, with just enough draught for it to burn, I led the fumes into a closed vessel of water through a short funnel, where, combining with the water, I had at once sulphuric acid. To test this I tackled my friends the dog-sharks, in Stillwater Cove, and obtained several bladders, very thin and light, just suited for my purpose, which I blew up with atmospheric air, and allowed to dry perfectly in the sun. When they were in proper condition I placed in one of my porcelain jars a few handfuls of iron and steel filings, and poured upon it some of the sulphuric acid that I had made, and then lashed the neck of the bladder to the orifice of the jar. I watched my experiment with subdued excitement. I felt sure that I was right in theory; would the thing work in practice? I had yet to see. After leaving the bladder on for a considerable time, I drew a string around it perfectly tight so that no gas could escape and released it from the jar. With fear and trepidation I loosed my hold upon it, and in one moment it shot up into the sky like a rocket till it was nearly beyond my sight, when it disappeared in a northeasterly direction before a strong wind that was blowing. I was as pleased as a boy with his first toy-balloon, and, like a child, I let off several of these bladders as fast as filled with gas, perfectly fascinated to see them ascend and then disappear in the blue ether.
Here was a means at once of sending up daily messengers to all parts of the world, stating the latitude and longitude of the island, and asking for rescue. Aye, but there was the rub; without my treasure how gladly would I have seized upon this method of letting my captivity be known, but with it I had become a coward. I wanted to escape, and did not dare to ask anyone to aid me. The knowledge that I could ask was, of course, a satisfaction, but as yet I did not dare to risk it, and put the matter on one side for further meditation at some future day. Finding that my theory about the gas was correct, I went to work again upon my clothmaking, and worked hard at it nearly six months, when I had sufficient quantity for my purpose, which was to make a balloon of large enough size to make an ascension in myself. I did not have any foolhardy idea of leaving the island in a balloon and landing I knew not where, but I was determined to make a series of experiments in several directions, that had been running through my head for years before, and to see what they were worth. In the first place I went to work and made a balloon, in the shape of an immense cigar, of the cloth that I had manufactured, which was some thirty feet long, and ten feet in diameter. My theory was this. In all balloon ascensions navigators heretofore had only been able to fill a sack with gas, and to ascend into the air, and descend by allowing the same to escape, in other words, to have but little control of the machine except to ascend and descend, and this in a limited degree. I had often noticed that, in the severest storms, seabirds would remain poised in the air without moving a wing, facing the wind, and yet not recede before it, but by a slight motion of the wings, not up and down or a stroke, but a sort of elevation of the body, dart dead to windward against it. I had also noticed that, if a tin plate was thrown into the air against a strong wind, it would often, if at the right angle, increase its speed greatly after leaving the hand, and dart into the wind's eye with extreme velocity. Hence I thought that a balloon could be made to tack in the air exactly as a boat tacks in the water, except that the motion of tacking should be perpendicular instead of horizontal. Suppose that a balloon, cigar-shaped like mine, was poised in air at an altitude of one thousand feet, and that at each end of the car was arranged a light but large horizontal flat surface, exactly like a barn door laid upon the ground, with its hinges attached to the car. To advance against the wind why not elevate the one in front and depress the one in rear to the right angle, or till they were filled as we should say of sails, and then advance into the wind's eye, increasing at the same time the elevation, as the tin plate is forced forward; and, having made a tack upward and forward, why not elevate the rear screen and depress the front one, and descend towards the earth at an angle, still eating our way to windward, and when near the surface reverse the action and mount again heavenward, but still to windward. Besides this, why should not my balloon be filled with gas till it would lift myself, the screens, the car, and all its apparatus within one or two pounds. That is to say, to have just enough gas in the balloon, not to raise the apparatus, but to so nearly raise it that another person, if present, could lift the whole in his hand; practically to reduce the weight of my body to that of a good sized duck; then with small wings, not immense cumbersome ones, the same size that would raise a duck, I ought to be able to raise myself, and sail in the air. Could it be done?