Born on 14 June 1870, he studied medicine at Guy's Hospital, where he qualified in 1895. He continued his studies in London obtaining the MB with honours in medicine in 1902 and the FRCS in 1903. Shortly after this Mumford settled in practice at Bath where he spent his working life. He was appointed anaesthetist to the Royal United Hospital in 1905 and assistant surgeon in 1910. During the first world war he served in the RAMC as a surgeon specialist at the military orthopaedic hospital at Southmeads, Bristol, with the rank of Major, and was appointed OBE. After the war Mumford built up a large surgical practice in Bath. He became surgeon to the Royal United Hospital, the Royal Mineral Water Hospital, the Ministry of Pensions Orthopaedic Hospital, and the Bath and Wessex Children's Orthopaedic Hospital at Combe Park. While honorary secretary of the Bath division of the BMA he was appointed local secretary for the annual meeting there in 1925; owing to the sudden illness of the President, F G Thomson, Mumford took his place most capably. He was a vice-president of the section of surgery at the Nottingham meeting, 1926, and President of the Bath and Bristol branch, 1931-32. Mumford was a handsome and conscientious man. He lived at 18 The Circus, Bath, but retired in 1934 to Willingdon, Sussex. He died at Eastbourne on 27 April 1955 aged 84, survived by his wife, their son and two daughters.