SIKKIM HIMALAYA by David Lang Pomegranate Press, £29.95, pp.200 ISBN 0953349373 Friends in high places David Lang first heard about the Himalayas when he was a little boy. As his father read aloud from the works of the great botanical explorers - Reginald Farrer, Frank Kingdon-Ward, and 'Chinese' Wilson - he imagined the high mountains and the flower-filled valleys. Above all, he longed to see the yaks: 'there was something about yaks which appealed to a small child'. When he grew up, David Lang became a vet with a busy practice in Sussex. He is also an accomplished field naturalist, equal...