Born at Llanelly, South Wales on 18 June 1881, second son of Henry Roger Thomas and Edith Anne Thomas, his wife. He was educated at the Friends School, Bootham, entered the Leeds Medical School in 1898, and afterwards studied at the London Hospital, whence he took the London and Conjoint qualifications in 1905. He then served during four years as house surgeon, house physician, resident obstetric officer and resident casualty officer at the Leeds General Infirmary, and took the Fellowship in December 1910. Thomas settled in practice at Wakefield, where he became surgeon and subsequently consulting surgeon to the Clayton Hospital, and lived at The Elms, 9 Bond Street, Wakefield. He was a member of the Leeds and West Riding Medico-chirurgical Society and in 1930-32 was chairman of the Wakefield, Pontefract and Castleford division of the British Medical Association. He married in 1910 Edith Ella Cranswick, who survived him with two sons and a daughter. Thomas retired in August 1943 to Sunnyhurst, 8 Downside Road, Guildford, Surrey, where he died on 26 November 1943. Publications: Severe injury of hand; operation; result. *Brit med J* 1911, 2, 72. A suppurating "branchial" cyst, with C A Robinson. *Ibid* 1913, 1, 763. A large retropharyngeal swelling due to an aneurysm. *Practitioner*, 1918, 101, 169.