Born 30 January 1872 the second child and eldest son of Albert Greg, of Escowbeck Caton, and his wife,* née* Rowlands. He was educated at Marlborough College and Trinity College, Cambridge, where he took second class honours in the Natural Sciences Tripos, Part 1, 1894. He received his clinical training at St Thomas's Hospital, served as house surgeon and house physician there and was afterwards physician to the electrical and x-ray department. He was also medical officer to the x-ray department of the Brompton Hospital. During the first world war he was commissioned as a captain in the RAMC on 4 January 1916, and was created OBE for his services in 1919. Greg lived at West Halkin Street, SW, later at 26 Hyde Park Gate, SW, and finally at 19 St George's Court, SW7, before retiring to The Snab, Hornby, Lancaster. He moved later to Churchgates, Melling, Carnforth, Lancashire, where he died on 17 March 1947, survived by his sister Miss E M Greg; he was unmarried.