_August 4._ A little before daybreak we perceived that the hulk was heeling over, and aroused ourselves to prevent being thrown off by the movement. At first the roll was slow and gradual, and we contrived to clamber over to windward very well, having taken the precaution to leave ropes hanging from the spikes we had driven in for the provision. But we had not calculated sufficiently upon the acceleration of the impetus; for presently the heel became too violent to allow of our keeping pace with it; and, before either of us knew what was to happen, we found ourselves hurled furiously into the sea, and struggling several fathoms beneath the surface, with the huge hull immediately above us. In going under the water I had been obliged to let go my hold upon the rope; and finding that I was completely beneath the vessel, and my strength utterly exhausted, I scarcely made a struggle for life, and resigned myself, in a few seconds, to die. But here again I was deceived, not having taken into consideration the natural rebound of the hull to windward. The whirl of the water upward, which the vessel occasioned in rolling partially back, brought me to the surface still more violently than I had been plunged beneath. Upon coming up, I found myself about twenty yards from the hulk, as near as I could judge. She was lying keel up, rocking furiously from side to side, and the sea in all directions around was much agitated, and full of strong whirlpools. I could see nothing of Peters. An oil-cask was floating within a few feet of me, and various other articles from the brig were scattered about. My principal terror was now on account of the sharks, which I knew to be in my vicinity. In order to deter these, if possible, from approaching me, I splashed the water vigorously with both hands and feet as I swam towards the hulk, creating a body of foam. I have no doubt that to this expedient, simple as it was, I was indebted for my preservation; for the sea all around the brig, just before her rolling over, was so crowded with these monsters, that I must have been, and really was, in actual contact with some of them during my progress. By great good fortune, however, I reached the side of the vessel in safety, although so utterly weakened by the violent exertion I had used that I should never have been able to get upon it but for the timely assistance of Peters, who now, to my great joy, made his appearance (having scrambled up to the keel from the opposite side of the hull), and threw me the end of a rope--one of those which had been attached to the spikes.