Born at West Hampstead, 29 June 1881, fourth child and second son of Walpole Clarke, of the Bank of England, and his wife,* née* Gurney. He was educated at University College School, and took his medical training at St Bartholomew's Hospital, where he served as house surgeon. He was then senior house surgeon at the Metropolitan Hospital, and resident medical officer at the London Temperance Hospital. Clarke was commissioned in the RAMC in 1908, promoted captain on 1 February 1912, and served as surgeon specialist to various military hospitals. During the war of 1914-18 he served in France in command of the 48th Field Ambulance, and was promoted lieutenant-colonel on 14 June 1917. He won the DSO and was mentioned in despatches, twice by Haig and once by Milne. He devised a "caliper" splint which was much used in trench warfare. He served for a year at Cologne in the army of occupation. After the war Clarke was on the staff of the Royal Army Medical College at Netley, but resigned his commission in 1927 and went into private practice at Montagu House, Church Street, Leatherhead, Surrey. In 1932 he emigrated to New Zealand, where he died at Runnymede, Pukepoto, Kaitaia rural district, North Auckland, in 1935 after a short illness. Clarke married on 13 April 1909 Helen Simms, who survived him with two sons and a daughter. Publication:- The caliper splint. *J Roy Army med Corps* 1927, 49, 283.