Born in Bradford in 1877, the eldest son of David, medical officer to the Bradford Royal Infirmary, he was educated at Bradford Grammar School and at St John's College, Cambridge, where he took second-class honours in the Natural Sciences Tripos part I in 1899. He went onto St Mary's Hospital as a u

Born at Brooklands, Blackheath Park, SE on 30 March 1878, the second child of the marriage of Joseph Kidd, MD, with Frances Rouse, his second wife. His father, the seventeenth of a family of eighteen, was a well-known homoeopathic physician in London; a brother by a previous marriage was Percy Kidd,