Wakefield, Dr. A. W., 313 Waugh, Sir A., 10, 12, 13 Weather. _See_ Monsoon, Rainfall, Wind West cwm of Everest, 208-9, 212, 214 Wheeler, Major, E. O., 20, 26, 52, 164, 252, 320; expedition to Kyetrak, 74, 77-81, 98, 330-33; to Rongbuk Valley, 102, 333-36; discovers E. Rongbuk glacier, 217, 240, 247-8, 334; arrives at Kharta, 249; to Lhakpa La, 140-44, 257; to Chang La, 144-5, 258-61; returns by Kama Valley, 146-153, 337, and Teesta Valley, 164, 337; map by, 312, 328, 338; account of photographic survey by, 329-337 Wind, 50, 72, 75, 147-8, 171, 178, 265, 308, 342. _See_ Snow Wollaston, A. F. R., 20, 26; returns with Raeburn to Sikkim, 56; rejoins at Tingri, 74, 75, 96; trip to Nyenyam, 97, 108, 323-25; described by him, 281-89; at Kharta, 249; to Lhakpa La, 140 ff., 257-8; returns by Kama Valley, 146-153, 165, 342; natural history notes by, 290-303, 344-350; collections, 312 Yaks, 61, 81, 161, 171, 286, 294, etc. Yaru, river, 56-7, 61-3, 101-2 Yatung, 38-9, 177 Younghusband, Sir F., 1, 15-17, 19, 20 Zachar-chu. _See_ Dzakar-chu Zambu, village, 81 * * * * * _Printed in Great Britain by_ Butler & Tanner, _Frome and London_ * * * * * [Illustration: MAP I. PRELIMINARY MAP to illustrate the route of the MOUNT EVEREST EXPEDITION 1921. Reduced from the map on the scale 1/253440 by Major Morshead and assistants of the Survey of India, accompanying the expedition: the neighbourhood of the Mountain from Map II. Scale 1/750,000 or 1 Inch = 11.84 Stat. Miles.] * * * * * [Illustration: MAP II Preliminary Map of MOUNT EVEREST constructed at the R. G. S. from photographs and sketches made by the EXPEDITION of 1921] * * * * * [Illustration: MAP III THE GEOLOGY of the MOUNT EVEREST REGION from the surveys of Dr. A. M. HERON Geological Survey of India 1921. The topography from Map I. Scale 1/750,000 or 1 Inch = 11.84 Stat. Miles. * * * * * The table below lists all corrections applied to the original text.