Born on 30 May 1871 at Hampstead, where his father was in practice at 1 Abercrombie Villas, Rosslyn Hill. He was the thirteenth child of William Henry Cook, MD, MRCS, medical officer for Hampstead parish, and his wife, Harriet Bickersteth. He was educated at St Paul's School and University College Hospital, where he served as ophthalmic Assistant, assistant demonstrator of anatomy, and assistant in the throat and ear department. He had taken first class honours in medicine at the London MB examination, and won the university scholarship and gold medal at the BS examination. Cook entered the mission field and served for many years under the Church Missionary Society in Uganda. He was Harford lecturer in ophthalmology at Livingstone College and surgeon to the Church Missionary Society's hospital at Mengo, and to the mission station at Namirembe, Kampala. During the war of 1914-18 he was assistant medical officer at the Bermondsey Military Hospital, and surgeon to the Richmond Military Hospital. Subsequently he was consultant in tropical diseases to the Ministry of Pensions, and consulting physician to the London Medical Mission. At the Church Missionary Society he served successively as secretary to the medical committee, physician, and consulting oculist. Cook married in 1899 Ethel Maddox, who survived him with three sons; one of whom, Dr N E Cook, was a member of the College. He died at 31 Narcissus Road, Kilburn, NW6 on 19 September 1946, aged 75. Publications:- Hygiene and medical research, in *Medical practice in Africa and the East* History of sleeping sickness in the Uganda protectorate. *St Thos Hosp Gaz* 30, 228.