Son of James Walter Everidge, he was educated at King's College School and King's College Hospital, where he was junior scholar in 1904, senior scholar in 1907 and Alfred Hughes anatomy prizeman. He qualified in 1908, and in 1912 became Sambrooke surgical registrar and surgical tutor at King's Colle

Born 10 March 1881 at Hinckley, Leicestershire, the second child and only son of Edward Simpson, a schoolmaster, and Charlotte McCann, his wife. He was educated at Mill Hill School and St John's College, Cambridge, where he was a scholar, and took first-class honours in the Natural Sciences Tripos,