Born at Wye, Kent on 22 August 1861, the second child and eldest son of William Frederick Brook, MRCS 1856, and Jane Darvill, his wife. He was educated at King Edward VI School, Berkhamsted and at St Thomas's Hospital. He served as house surgeon at St Thomas's, at the Hospital for Sick Children in Great Ormond Street, and at the West London Hospital. He then settled at Swansea and became one of the leading surgical consultants in South Wales. He was surgeon to the Swansea General Hospital, the Carmarthen Hospital, the Glamorgan County Hospital, and the Port Talbot General Hospital. During the war of 1914-18 he served at the 3rd Western General Hospital at Cardiff, with a commission as major, RAMC(T), dated 30 December 1908, when the RAMC territorial force had been formed. He founded the British Legion medical advisory committees which act between disabled "legionaries" and the Ministry of Pensions. Brook was local secretary at the British Medical Association annual meeting at Swansea in 1903, and a vice-president of the section of surgery at the Oxford meeting in 1904, and he served for two periods on the central council of the Association. He died at Shirecombe, Pennard, near Swansea on 26 May 1941 and was cremated at Pontypridd. He had practised at 9 Sketty Road, Swansea. Brook married on 16 June 1898, Agnes Beatrice Hine, who survived him with a son, Group-Captain Arthur Brook, RAF, and a daughter. Publication:- Forced extension as a cause of fracture-dislocation of the spine. *Brit med J*. 1936, 1, 470.