An English surveyor, explorer and mountaineer. He is remembered for several achievements – with Frederick Bailey he explored the Tsangpo Gorge and finally confirmed that the Yarlung Tsangpo flows into the Brahmaputra River after cascading through Himalaya; also he was a member of the 1921 and 1922 British Mount Everest expeditions and in 1922 he climbed to a height of over 25,000 feet (7,600 m). His death was due to murder and the circumstances remain mysterious.