Keeper of the Department of Greek and Roman Antiquities, British Museum, 1956-1976. Haynes' father was Hugh Lankester Haynes (1878-1956), an Episcopal minister and his mother, Emmeline Marianne Chaldecott (1885-1968). After attending Marlborough College between 1926 and 1932 he entered Trinity College, Cambridge, concentrating in classical archaeology and graduating in 1936. He studied Roman provincial archaeology at Bonn before admission to the British School at Rome between 1936 and 1937.