Henry Treise Morshead (23 November 1882 – 17 May 1931) was 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 . His death was due to murder and the circumstances remain mysterious. Early and personal life Born in 1882 and brought up at Hurlditch Court, near Tavistock near the Devon–Cornwall border, Henry Morshead was the eldest son of Reginald Morshead, a banker, and Ella Mary Morshead, née Sperling. He was educated at Winchester College where he did reasonably well and at a second attempt passed the exams to enter the Royal Military Academy, Woolwich, to become an officer in the Royal Engineers in 1901. At the Chatham Royal School of Military Engineering he had such a distinguished record that in 1904 he was posted to the Indian Army in the Royal Engineers' Military Works Services at Agra. In 1906 he joined the Survey of India where, as was often the case, he retained his military status and rank. Apart from his service in the Great War he remained with the Survey until his death. Morshead was based at Dehradun, Uttarakhand, the scientific and exploration headquarters of the Survey of India. He became in charge of the Forest Map Office, then the Computing Office, then the Triangulation Surveying Party. He became knowledgeable in the history of Himalayan exploration, particularly in Tibet. He distinguished himself on several arduous winter Himalayan expeditions. He was tough, well able to live off the land in regions of great heat and danger. Morshead was promoted to captain in 1912 . On leave in 1916, he met Evelyn (Evie) Widdicombe who was Secretary and Librarian for the Froebel Society for the Promotion of the Kindergarten System. Her family had moved to Canada when Evie was a child where her father, Harry Templer Widdicombe, failed to make his fortune so her mother had returned to England with the children. Her mother had founded a ladies' residential club which flourished. Morshead married Evie in 1917 and they had four sons and a daughter. Two of their sons were killed in World War II. Exploration of the Tsangpo