Born on 30 August 1861 at New Malton, Yorkshire the fifth son of the Rev John Walker, Rector of Bradwell, Great Yarmouth, his elder brother Robert being the first Archdeacon of Uganda 1893-1912, he was educated at Haileybury and Jesus College, Cambridge, where he took second-class honours in the Natural Sciences Tripos part I, 1884. He had his clinical training at the London Hospital, where he was house surgeon and was senior house surgeon at Moorfields, the Royal London Ophthalmic Hospital. He settled in Bristol to practise as an ophthalmologist, and was appointed surgeon to the Eye Hospital. Later he lectured on ophthalmology in the Bristol Medical School, and ultimately became consulting ophthalmic surgeon to the General Hospital. He was President of the Bristol Medicochirurgical Society in 1921 and of the section of ophthalmology in the Royal Society of Medicine in 1929-30, and Master of the Oxford Ophthalmological Congress in 1933 and 1934. Walker married in 1900 Theodosia Caroline daughter of the Rev J H B Green, Rector of Normanton-le-Heath, Leicestershire, who was herself a doctor of medicine (MD Brussels 1896). Mrs Walker died on 26 November 1953 aged 81, and Walker himself on 29 September 1955 aged 94, survived by two sons and three daughters. He had lived at Harewood, Clapton-in-Gordano, Bristol, but in his later years at 50 St John's Road, Clifton. Walker carried on the fine tradition of Bristol eye surgery established by F R Cross FRCS, and promoted the reconstruction of the Bristol Eye Hospital.