In conformity with this new plan, I fixed the height of my intended ceiling, and sawed off my nearest trees to that, sloping from the sides to the middle, to support cross-beams for the roof to rest on, and left the trunks standing, by way of pillars, both for the use and ornament of the structure. In short, I worked hard every day upon my building for a month, in which time I had cut all my timber into their proper lengths for my outworks and covering, but was at a great stand how to fix my side-posts, having no spade or mattock, and the ground almost as hard as flint, for to be sure it had never been stirred since the creation. I then thought I had the worst part of my job to get over; however, I went on, and having contrived, in most of my upright side-quarters, to take the tops of trees, and leave on the lower parts their cleft, where they began to branch out and divide from the main stem, I set one of them upright against the rock, then laid one end of my long ceiling-pieces upon the cleft of it, and laid the other end upon a tree on the same side, whose top I had also sawed off with a proper cleft I then went and did the same on the other side; after this I laid on a proper number of cross-beams, and tied all very firmly together with the bark of young trees stripped off in long thongs, which answered that purpose very well. Thus I proceeded, crossing, joining, and fastening all together, till the whole roof was so strong and firm that there was no stirring any part of it I then spread it over with small lop wood, on which I raised a ridge of dried grass and weeds, very thick, and thatched over the whole with the leaves of a tree very much resembling those of a palm, but much thicker, and not quite so broad; the entire surface, I might say, was as smooth as a die, and so ordered, by a gentle declivity every way, as to carry off the wet.