Born 21 November 1889, the seventh child and second son of William Carlton, muslin draper, of Grantham, and Mary Elizabeth Rollinson, his wife. He was educated at Doncaster Grammar School, and won an open exhibition in mathematics and natural science to St John's College, Oxford, where he began by reading law, but took second-class honours in physiology in 1912. He entered St Mary's Hospital, London, with a university scholarship, served as demonstrator of anatomy, and qualified in 1914. He was commissioned in the RAMC, and saw active service during the war in France and West Africa. He was wounded, and was awarded the Military Cross. He was at first a regimental medical officer with the London Regiment and the 2nd Life Guards, and later DADMS, 47th Division. On coming back to civil practice Carlton was house surgeon to the new professorial surgical unit at St Mary's, and made postgraduate study at Harvard, the Mayo Clinic, and Toronto. He took the Fellowship, though not previously a Member, and the Oxford mastership in 1923. He was surgical registrar at the Royal National Orthopaedic Hospital, and Surgeon to the Seamen's Hospital, Royal Albert Dock. Then he was elected surgeon to the National Temperance Hospital, where he was also curator of the museum. He was also senior surgeon to the South-eastern Hospital for Children. He was an active member of the Chelsea Clinical Society. Carlton examined for the General Nursing Council, and served the University of London as warden of Connaught Hall and as a member of the military education committee. Between the wars he kept his keen interest in the territorial army, and commanded the medical unit of the University of London OTC. When war began in 1939 he was appointed ADMS, 1st Anti-Aircraft division. Later he was in command of the 7th and 3rd General Hospitals and the 34th West African General Hospital, with the rank of colonel, Army Medical Service. He was serving in Crete at the time of the German invasion in 1941. After the formation of the National Health Service in 1948 he became a consultant surgeon to the North-West (Paddington) and South-East (Bromley) metropolitan regional hospital groups, and served on the council of the Regional Hospitals Consultants and Specialists Association. Carlton married in 1938 Valmai Myfanwy, youngest daughter of Lewis Davies of Porth, Glamorgan, who survived him with two sons and a daughter. He practised at 86 Brook Street, W1, and lived at 19 Westbury Road, N12. He died suddenly in London on 3 October 1951, aged 61, and was buried at St Marylebone Cemetery, Finchley. Carlton collected engravings and bred bull-terriers. He was often unpunctual, but was noted for his charm of manner and transparent honesty. Publications:- "Blood transfusion in children's practice." *Lancet*, 1926, 2, 850. "Factors in foot reconstruction." *Lancet*, 1929, 2, 605. "Two cases of malignant tumours of the testicle," with J McClure and H H Sanguinetti. *Brit J Urol* 1932, 4, 217.