Born at Wandsworth, SE, the second son of the Rev William Henry Clogg, a Wesleyan minister, and Mary King Sherwell, his wife. He was educated at Kingswood School, Bath, and the University College of South Wales. He received his medical training at Cardiff and afterwards at Charing Cross Hospital. At the University of London he gained the gold medal in anatomy and the gold medal at the MS examination in 1902. In 1900 he was appointed resident medical officer at Charing Cross Hospital, in 1903 he was appointed assistant surgeon, and at the time of his death was senior surgeon. He was also a member of the staff of the Evelina Hospital and of the South Eastern Hospital for Children. He acted as consulting surgeon to the Bute Hospital at Luton from 1915, to the Putney Hospital, and to the Chesham Cottage Hospital. From 1923 he was a member of the Court of Examiners at the Royal College of Surgeons. For many years he took an active interest in the Royal Society of Medicine, and acted as editorial secretary of the section of surgery. At the annual meeting of the British Medical Association in 1910 he was honorary secretary of the section of surgery. He married Mildred King on 24 March 1906, who survived him with one son. He died, after a very short illness, on 21 December 1932 and was buried at Chipstead, Surrey. Clogg did much good work unostentatiously. He set a high standard of surgery and was blessed with two main attributes which go far towards making a master craftsman: a perfect pair of hands and a calm demeanour which was never ruffled. He seldom spoke at meetings, but when he did so his observations were astute and practical. Publications:- *The stomach, Intestine and pancreas*, with W C Bosanquet, MD London, 1909. The rectum and anal canal, in Choyce's *System of Surgery*. 3rd edition 1932, 2, 556. Hernia in children. *Brit J Child Dis* 1906, 3, 375. Inguinal hernia in the child. *Clin J* 1913-14, 42, 465.