These projects left out of account an entirely new factor. In the early stages of the reconnaissance I had taken careful note of the party's health. One or two of the coolies had quickly fallen victims to the high altitudes; but the rest seemed steadily to grow stronger. Nothing had so much surprised us as the rapid acclimatisation of the majority, and the good effects, so far as they appeared, of living in high camps. Both Bullock and myself left the Rongbuk Valley feeling as fit as we could wish to feel. All qualms about our health had subsided. For my part I was a confirmed optimist, and never imagined for myself the smallest deviation from my uniform standard of health and strength. On August 7, as we toiled over the neve in the afternoon, I felt for the first time a symptom of weariness beyond muscular fatigue and beyond the vague lassitude of mountain-sickness. By the time we reached the moraine I had a bad headache. In the tent at last I was tired and shivering and there spent a fevered night. The next morning broke with undeniable glory. A photograph of our yesterday's conquest must be obtained. I dragged myself and the quarter-plate camera a few steps up to the crest of the moraine--only to find that a further peregrination of perhaps 300 yards would be necessary for my purpose: and 300 yards was more than I could face. I was perforce content with less interesting exposures and returned to breakfast with the dismal knowledge that for the moment at all events I was _hors de combat_. We learned a little later that Colonel Howard-Bury had arrived the night before in our base camp. It was easily decided to spend the day there with him--the day I had hoped to save; after the long dragging march down the green way, which on the ascent had been so pleasant with butterflies and flowers, I was obliged to spend it in bed. Three days later, on August 11, our tents were pitched in a sheltered place well up the Kharta Valley, at a height of about 16,500 feet. Two tributary streams had been passed by, the first coming in from the North as being clearly too small to be of consequence, and the second from the South, because wherever its source might be, it could not be far enough to the North. Ahead of us we had seen that the valley forked; we must follow the larger stream and then no doubt we should come soon enough to the glacier of our quest and be able at last to determine whether it would serve us to approach Chang La. August 12, a day of necessary idleness after three long marches, was spent by the coolies in collecting fuel, of which we were delighted to observe a great abundance, rhododendron and gobar all about us, and, only a short way down the valley, the best we could hope for, juniper. The last march had been too much for me, and again I was obliged to keep my bed with a sore throat and swollen glands.