I had still an hour of good daylight during which I might begin my descent on to some suitable camping-ground, but there was not a moment to be lost.  At first I got along rapidly, for I was on the snow, and sank into it enough to save me from falling, though I went forward straight down the mountain side as fast as I could; but there was less snow on this side than on the other, and I had soon done with it, getting on to a coomb of dangerous and very stony ground, where a slip might have given me a disastrous fall.  But I was careful with all my speed, and got safely to the bottom, where there were patches of coarse grass, and an attempt here and there at brushwood:  what was below this I could not see.  I advanced a few hundred yards farther, and found that I was on the brink of a frightful precipice, which no one in his senses would attempt descending.  I bethought me, however, to try the creek which drained the coomb, and see whether it might not have made itself a smoother way.  In a few minutes I found myself at the upper end of a chasm in the rocks, something like Twll Dhu, only on a greatly larger scale; the creek had found its way into it, and had worn a deep channel through a material which appeared softer than that upon the other side of the mountain.  I believe it must have been a different geological formation, though I regret to say that I cannot tell what it was.

I looked at this rift in great doubt; then I went a little way on either side of it, and found myself looking over the edge of horrible precipices on to the river, which roared some four or five thousand feet below me.  I dared not think of getting down at all, unless I committed myself to the rift, of which I was hopeful when I reflected that the rock was soft, and that the water might have worn its channel tolerably evenly through the whole extent.  The darkness was increasing with every minute, but I should have twilight for another half-hour, so I went into the chasm (though by no means without fear), and resolved to return and camp, and try some other path next day, should I come to any serious difficulty.  In about five minutes I had completely lost my head; the side of the rift became hundreds of feet in height, and overhung so that I could not see the sky.  It was full of rocks, and I had many falls and bruises.  I was wet through from falling into the water, of which there was no great volume, but it had such force that I could do nothing against it; once I had to leap down a not inconsiderable waterfall into a deep pool below, and my swag was so heavy that I was very nearly drowned.  I had indeed a hair’s-breadth escape; but, as luck would have it, Providence was on my side.  Shortly afterwards I began to fancy that the rift was getting wider, and that there was more brushwood.  Presently I found myself on an open grassy slope, and feeling my way a little farther along the stream, I came upon a flat place with wood, where I could camp comfortably; which was well, for it was now quite dark.