We burnt off the top and the remaining branches, both Billy and I tending our separate fires, of which we had many, so that the work was made much lighter than it would have been if every single branch had needs be lopped with a clumsy axe. Having thus got a log of wood clear of branches, and, as I reckoned, about fifteen feet long, we peeled off the bark, and set to work to hollow out the vessel. It was plain that this would be a work of long time, for the trunk was about three feet thick, and I do not know how many months we might have been about it if we had not brought fire again to the aid of our axes. We found that we could save time by allowing fires to smoulder for long periods in the top of the log, which we wished to hollow out; and by starting these fires at intervals, we found that when we had chipped away the charred wood beneath the first, the wood beneath the second was ready to be chipped away also, and so on all down the log. Billy and I were thus employed the whole livelong day, and many days in succession, in building and removing fires, and chipping away the charred wood, by which means we gradually dug deeper and deeper into the heart of the log, rejoicing as we saw it, by almost insensible degrees, receiving the semblance of a canoe. The tree had fallen, as I said, over the cliff on to the sandy beach, and we were in some trouble of mind lest a high sea, or peradventure a violent storm, should carry our canoe away before it was finished. It lay a little above high-water mark, it is true; but for our greater security we moored it, when we left work upon it, by means of ropes to some heavy rocks, which we trusted would preserve it from any such untoward event. And it was indeed lucky we did so, for when we had been for some weeks (as I guessed) at the work--not continuously, for we had many other things to attend to--one night a violent storm got up, with great fury of wind and rain, and also some rumbling in the mountain, which made us feel very uneasy; and when we went down in the morning, the storm having ceased, to see what had happened to our canoe, we found that it had been lifted and tossed about by the sea, being indeed half full of water; but mercifully the waves had not dashed it against the rocks at the base of the cliff, or it would assuredly have been shattered, or at least very much damaged.