Born on 31 July 1862 at Madras, India, the third child and second but eldest surviving son of Samuel Brock, controller of public works accounts for Madras, and his wife Phoebe Parsons. He was educated at University College School, London and University College Hospital, where he won the Filliter exhibition and the Atchison scholarship, and served as house physician, resident obstetrician and ophthalmic assistant. He was then appointed physician to the Westminster General Dispensary. From 1886 11 1932 Brock was in general practice in south Hampstead. He was a Fellow of the Royal Sanitary Institute and at one time an assistant examiner in hygiene for the Science and Art Department, South Kensington. He was secretary of the International Congress on Hygiene at its seventh meeting, in London 1891. Brock retired in December 1932 and settled at 50 Queen's Road, Beckenham, Kent. His house there was severely damaged in the flying bomb raids of July 1944 and he moved to 137 Waxwell Lane, Pinner, Middlesex. After a year there he took part of a house at Worthing, Sussex (Rotorua, 30 Navarino Road), but died suddenly in his sleep after five weeks there, on All Saints' Day, 1 November 1945; he had been to church in the morning and seemed in good health. Brock married in 1898 Margaret Lupton, who survived him with a son and three daughters. During his retirement Brock maintained his interest in medicine and anatomy and wrote on Shakespearean problems. He always objected to state regulation of practice and never joined the panel system. Publications:- Mechanism of delivery of foetal head. *Lancet*, 1892, 1, 307. Case of labour at term in uterus didelphys. *Lancet*, 1902, 2, 1319. A case of hepatic abscess (?) treated by a vaccine; recovery. *Lancet*, 1909, 1, 610. A case of trench fever in a civilian. *Lancet*, 1918, 2, 144. The conduct of labour and puerperal sepsis. *Lancet*, 1919, 2, 277 and 456. *The dramatic purpose of Hamlet*. Cambridge: Heller, 1935. *Iago and some Shakespearean villains. Ibid*. 1937. In 1943 Brock presented a large number of copies of his two Shakespearean books to the Friends of the National Libraries for distribution.