Born at Smyrna on 18 November 1855, the second son of Carsten Holthouse, FRCS, and Agnes Cowcher Kent his wife. Carsten Holthouse was serving in the Civil Hospital there during the Crimean War; he was then assistant surgeon, and afterwards surgeon and consulting surgeon to the Westminster Hospital. He was educated at Westminster School and Trinity College, Cambridge, of which he was an exhibitioner, and took second class honours in the Natural Sciences Tripos 1878. He received his medical training at King's College Hospital, served as house surgeon there, and was clinical assistant at Moorfields. He qualified in 1881, and took the Fellowship in 1884 on the same day as John Bland Sutton, William Job Collins and R Lawford Knaggs. He was surgeon to the St Pancras and Northern Dispensary, and later to the Western Ophthalmic Hospital, to which he was elected consulting surgeon on his retirement. He practised at 1 Park Crescent, W. After retiring he lived at 6 Gilbert Road, Ramsgate, Kent, and became an authority on medieval history. Holthouse married in 1884 Harriet Emily, eldest daughter of Robert Hesketh, FRIBA, of Earlswood Mount, Redhill; Mrs Holthouse died on 20 October 1940. He died at Ramsgate on 2 January 1949, aged 93, being the senior Fellow as his father had been. He was survived by two sons. His ashes were buried at All Saints Parish Church, Lower Edmonton. Publications:- *Convergent strabismus and its treatment, an essay*. London, 1897. The Emperor Henry II, 1002-1024 AD *Cambridge Medieval History*, 1922, 3, 215-252: Chapter 10.