Born in 1899, Leonard Crosfield studied at Oxford before joining the Oxford and Bucks. Light Infantry for service in Northern France in 1918. After the war he joined the Burmah Oil Company, for whom he worked until his retirement in 1949 having achieved the position of Manager, Burmah Oil Co. (India Concessions) Ltd. in Karachi, where he served during Partition. During his time with the BOC he served throughout Burma and, after 1941, in North India and Calcutta. He retired to Britain (via a visit to South Africa) in 1949, where he lived until his death in 1987.