That night I had no more appetite for sleep than the night before, and finding little rest or ease in my cabin, was up upon deck for most of the time. Though I did not choose just then to hold conversation with my passengers, I noticed that they were all upon deck, where they sat talking together in low tones. As the night advanced, however, they betook themselves to their cabins, one after another, until only Captain Leach was left sitting alone.
He remained there for maybe the space of half an hour, without moving a hair's-breadth, so far as I could see. At the end of about that length of time, being in a mightily anxious state, I stepped forward to see for myself that the watch was keeping a sharp lookout. I was not gone for more than a minute or two, but when I came back I saw that Captain Leach was no longer where he had been before; yet although I noticed this circumstance at the time, I gave no more thought to it than I would upon an ordinary occasion.
As there was no one on the poop, I myself went up upon that deck, it being so much cooler there than on the quarter-deck below. I took out my pipe and filled it, thinking to have a quiet smoke, which is a most efficacious manner of soothing any perturbation or fermentation of spirits. Just as I was about to strike my flint for a light, I heard a noise under the stern-sheets, as of some one stepping into a boat, and almost immediately afterwards a slight splash, as of an oar or a paddle dipped into the water. I ran hastily to the side of the vessel, and looked astern and into the water below.
Although the sky was clear, the night was excessively dark, as one may often see it in those tropical latitudes; yet I was as well assured that a boat of some sort had left the ship as if I had seen it in broad daylight, because of the phosphorescent trail which it left behind it in its wake.
I had slipped a pistol into my belt before quitting my cabin, and as I hailed the boat I drew it and cocked it, for I thought that the whole occurrence was of a mightily suspicious nature. As I more than half expected, I got no answer. "Boat, ahoy!" I cried out a second time, and then, almost immediately, levelled my pistol and fired, for I saw that whoever the stranger was, he had no mind to give me an answer.
At the report of the pistol both Mr. Langely and Mr. White came running to where I was, and I explained the suspicious circumstances to them, whereupon Mr. Langely suggested that it might have been a shark that I had seen, vast quantities of which voracious animals dwell in those and the neighboring waters. I did not controvert what he said, although I knew beyond a doubt that it was a craft of some sort which I had discovered—possibly a canoe, for the dip of the paddle, which I had distinctly seen in the phosphorescence of the water, appeared first upon the one side of the wake and then upon the other, as the blade was dipped into the water from side to side; so although, as I said, I did not undertake to controvert Mr. Langely's opinion, I was mightily discomposed in my own mind concerning the business.
At this time there was a vast deal of disturbance aboard the Greenwich and the Ostender because of my hail and the discharge of the pistol, which, however, soon quieted down when they found that nothing further followed upon the alarm.
I walked up and down the poop-deck for a great while, endeavoring to conceive what could be the meaning of the boat, which had most undoubtedly been lying under the stern of the Cassandra, and how it came that the watch had failed so entirely to discover its arrival. It would not have been possible for an ordinary ship's boat to come upon us so undiscovered, for, as I myself knew, the watch were keeping a sharper lookout than usual; therefore this circumstance, together with that which I had above observed concerning my opinion that the craft had been rowed with a paddle, led me to conclude that it was one of the native canoes, though I was as far as ever from guessing what the object of the visit had been, or what it portended. As I sat ruminating upon this subject, looking straight ahead of me, without thinking whither my observation was directed, I presently perceived that I was looking absently at the spot where Captain Leach had been sitting a little while before. This led me to think of him, and from him of the jewel that was in my keeping, and of its excessive value. Of a sudden it flashed into my mind, as quick as lightning, what if Captain Leach should have it in his mind to practice some treachery upon us all?
I may truly say that this thought would never have entered my brains had not the circumstance of Captain Leach's conversation with me in my cabin tended to set it there. But no sooner had this gloomy suspicion found place in my mind than it and those troubles which had beset me of late, and the loss of that sleep which I had failed to enjoy the night before, together cast me into such a ferment of spirits as I hope I may never again experience. Nor could I reason my mind out of what I could not but feel might be insane and unreasonable fancyings.
At last I could bear my uncertainties no longer, but went down into the great cabin, and so to the door of the berth which Captain Leach occupied. I knocked softly upon the door, and then waited a while, but received no answer. After that I knocked again, and louder, but with no better success than before. Finding I was like to have no answer to my knocking, I tried the door, and found that it was locked.