Having risen over the col 17,750 feet, we saw before us an extensive valley with barren hills scattered over it. To the South we observed a large plain some ten miles wide, with snowy peaks rising on the farther side. In front was a hill projecting into the plain, on which stood a _mani_ wall; and this latter discovery made me feel quite confident that I was on the high road to Lhassa. About eight miles off to the NNW. were high snowy peaks, and as we went farther we found a lofty mountain range, with still higher peaks, three miles behind it. We had travelled half-way across the waterless plain, when we noticed a number of soldiers' heads and matchlocks popping in and out from behind a distant hill. After a while they came out in numbers to observe our movements, then retired again behind the hill. We proceeded, but when we were still half a mile from them they abandoned their hiding-place, and galloped away before us, raising clouds of dust. From a hill 16,200 feet, over which the track crossed, we perceived a group of very high snowy peaks about eight miles distant. Between them and us stood a range of hills cut by a valley, along which flowed a river carrying a large volume of water. This we followed to 126 deg. (b.m.), and having found a suitable fording-place, we crossed over at a spot where the stream was twenty-five yards across, and the water reached up to our waists. We found here another _mani_ wall with large inscriptions on stones, and as the wind was very high and cutting, we made use of it to shelter us. Within the angle comprised between bearings 240 deg. and 120 deg. (b.m.) we could observe a very high, snowy mountain range in the distance (the great Himahlyan chain), and lower hill ranges even as near as three miles from camp. The river we had just crossed flowed into the Brahmaputra, and we were now at an elevation of 15,700 feet. We saw plainly at sunset a number of black tents before us at bearings 120 deg.; we calculated them to be two miles distant. We counted about sixty, as well as hundreds of black yaks. [Illustration: AN EFFECT OF MIRAGE]