THE SUBMARINE BOAT.—Page 243.
I wish that I could describe the sights that I saw. It seemed as if I was in another world, and had passed from this existence to one more advanced, in which I floated in space. The extreme silence of all about me, and the rigidness of all objects seen, was very striking. At each moment some beautiful fish or plant struck my view, of which I had never before had any knowledge. I moved about in all directions, trying to find, if possible, some bank of pearl-oysters, and I had a good idea of how they ought to look, for I had once, in my younger days, descended with the divers in the East Indies to the pearl-oyster beds, and knew the whole practical science of the business. At last, at a point by compass and dead-reckoning about northeast from Point Deliverance, and distant two miles, I came upon what I wanted,—or rather what I hoped was what I wanted,—namely, a perfect bank of oysters, in thousands, clustered together. My first act was, after stopping the boat, to throw over a light anchor, to hold it in position; the next to cast into the water a small grapnel, to which was attached a long piece of rawhide rope, fully forty fathoms in length, ending in a wooden buoy, shaped like a tenpin in a bowling-alley, and of about the same size. This, after dropping the grapnel, by means of a short boat-hook I thrust under the tank of the boat, and saw it rapidly take up the spare line as it ascended towards the surface. And as it was so ascending it flashed upon me that here was also a practical way of determining at all times the depth of water; for this buoy only took out about seven or eight fathoms of the line before it became stationary, evidently having reached the surface. I used this buoy to anchor the reef, so as to be able to find it in future trips, when I had only to stand out towards it, on pleasant days, on the surface of the water, and, when I found it, descend and find myself on the reef.
And for measurement of my depth below the surface I had only, in future, to fasten a light, buoyant piece of wood to a small cord, marked off into fathoms, which I could at any time thrust under the tanks and allow to ascend to the surface, and note how many of the fathoms of line were taken up, which would denote my depth below the surface, and then draw my sounding-buoy back again into the boat for further use, simply reversing the method that is used on shipboard. That is to say, instead of throwing a lead with a marked line to the bottom of the ocean, I threw a buoy to the surface. Nature seemed to be capsized, and everything upside down, as used to appear in using the inverted telescope in my first attempts to take the altitude of the sun with a sextant. If I had not lived so solitary a life I could have laughed at many of the things that befel me in this submarine boat.
Having gotten the boat securely anchored, and the buoy thrown out as I have related, I went to work gathering the oysters. I had taken care to bring with me a light pickaxe, a crowbar, and a sort of hand-rake, similar to ones used by East Indian divers, which I proceeded to employ upon the mass of oysters below me. I had no difficulty in detaching all I wanted of them, and filling my decks, and particularly the hanging shelves, which I relieved of their stones and weights, replacing them by masses of the oysters. I made a long job of this, and, having gotten all I desired, I drew up my anchor and got again under way, ascending as near as possible to the surface before advancing towards the land. During all this time, whenever necessary, I had renewed my air by use of the spray-wheel.
Being near the surface, which I was made aware of in several ways, such as the increased light, the disappearance of the bottom from view, and a slight noise of the waves above me, and a little motion of the boat, caused by their agitation, I put the goats at full speed, feeling sure that for at least two miles nothing was in my way. After I had, as I calculated, gone this distance, I slowed down, and proceeded more cautiously; but after an hour's work I made no land, nor found any great shallowing of the water. Here was a pretty scrape. By my chart I was past Stillwater Cove, and even in the interior of the island, and not a sign of the land or shallow water could I find. I began to be seriously troubled, and I foresaw that unless I soon made some shallow water I should be obliged to dive under my tanks, and look about me and see where I was. But before I did this I descended and anchored, and found out for the first time that I was at last in a strong current, setting towards the westward. This frightened me still more, and I ascended at once, stripped off the little clothing that I had on, and plunged into the water and came up buoyant as a cork on the surface, and pulled the canoe towards me and got into it without much effort. One glance showed me what the trouble was. I had gradually, during the whole day, drifted to the westward, and had passed West Signal Point, and was, in the direction I was pursuing, leaving the island on the port hand, behind me. One glance in the open air cleared my brain, and gave me a true idea of where I was, for I confess that the many courses that I had sailed beneath the surface had rather confused me.
Taking one more good look about me, I plunged into the sea under my tanks, and was again inside my boat, which I speedily started in the right direction, and in less than two hours made shallow water, when I once more had to dive out of the boat and look about me, when I found that I had made a pretty good landfall, as I was in Perseverance Bay, not more than a quarter of a mile from the mouth of Stillwater Cove, having overrun it; and as I was so near home I dove back again, started the goats, and soon had the pleasure of finding myself in the cove, some part of the bottom of which I already recognized; and I foresaw that if I should make many trips I should be able to recognize the bottom just as easily as one recognizes familiar objects on land.
I stranded my boat in the usual manner, and waited for the tide, which was now at an ebb, to leave the top exposed, for the buoyancy of the boat was not very great from my frequent use of the air-tank stopcock. During this time I busied myself in casting the oysters to the bottom, and then moving the boat, which was thus lightened, a little to one side, so that, when the tide returned, the former would be exposed clear of the boat. I then unshipped the movable shelves and put everything in order in the interior, and sat down and ate a hearty meal, after which I tried the manhole, which, by the pressure of the tanks upon the sand, I felt confident was above the surface, which proved to be the fact. I soon had the goats ashore, who seemed to be glad to escape from the confinement of the boat, and gambolled about me. I waited patiently for the tide to go down far enough for me to get at my oysters, which I conveyed to the land, above high-water mark, and, sitting down, commenced with my knife to open one or two of them. I think it was the third that I was opening when my knife-blade struck against something that made my heart beat. I laid open the oyster, and there within it, nestled near to the upper shell, was as beautiful and perfect a pearl as anyone could desire to see. It was not very large,—perhaps the size of a common pea,—but of a pure cream color, and of perfect oval form. I knew at once that it was a jewel of value and price, and I carefully hid it away in my clothing. This prize sufficed me. It proved to me the importance of my discovery, and I was determined that the sun should do the remainder of the work for me, and therefore left the oysters where they lay, to be made putrid by exposure, when the pearls that they might contain could be very easily washed out.