Born at Exeter, 22 April 1863, the eldest son of Captain Alexander Foulerton of HM Indian Navy. He was educated at Kensington School and studied medicine at St Bartholomew's Hospital, London. In 1884 he served as assistant house surgeon at St Bartholomew's Hospital, Chatham, when A W Nankivell was house surgeon. He became clinical assistant at the Royal Westminster and the Royal London Ophthalmic Hospitals, but soon determined to devote himself to the rapidly expanding science of pathology. In 1899 he was appointed pathologist to the Chelsea Hospital for Women and in 1897-98 was assistant bacteriologist and demonstrator of biological chemistry at the Jenner (now the Lister) Institute of Preventive Medicine. He was elected in 1899 lecturer on public health and bacteriologist at the Middlesex Hospital, where during 1900-04 he was in charge of the Cancer Research Laboratories. In 1902 he was assistant, and later chief, medical officer to the East Sussex County Council, and lecturer on public health at University College, London, and at the London School of Medicine for Women. From 1902 until April 1928 he was actively engaged in public health work in East Sussex, and on his retirement he was complimented by being appointed honorary consulting medical officer of health. He joined the RAMC(T) during the war of 1914-18 with the rank of captain, and took over the charge of the Chemical and Hygiene Laboratory at Boulogne, which carried out all food and other analyses in connection with the British Army in France. He served in this position from 1915 to 1917, when he was sent home to take charge of the hygiene department of the Royal Army Medical College, then housed in University College Hospital. Foulerton served as an examiner in public health to the University of London and to the Royal Colleges of Physicians and Surgeons, and when Milroy lecturer at the Royal College of Physicians in 1910 he took as his subject "The streptotrichoses and their relationship to tuberculosis". At the annual meeting of the British Medical Association at Ipswich in 1900 he was honorary secretary of the section of pathology, and at the Sheffield meeting in 1908 he was a vice-president of the section. He was greatly interested in the work of the London and Counties Medical Protection Society, of which he was one of the first members, and served for ten years (1895-1905) as the honorary financial secretary. He married on 22 October 1891 Jessie Blanche Wakeley, who survived him with one son and two daughters. His son, Alexander Barclay Foulerton, was lieutenant-commander in HMS *Beaufort*, the survey ship, at the time of his father's death. Foulerton died on 2 February 1931, two days after a cerebral haemorrhage. Foulerton had great administrative capacity and a sound judgement, in addition to his scientific attainments. He was also possessed of wide literary, historical, and naval knowledge. Tall and good-looking, he spoke in a hesitating manner and in a quiet pleasant voice. Publications:- Joint editor *Review of Bacteriology*, 1911-17. Joint editor *Archives of the Middlesex Hospital*, 1903-14, and editor of the *Reports of the Cancer Research Laboratory*, 1902-04 which were issued as part of the *Archives*. *The streptotrichoses and tuberculosis*. Milroy lectures. London, 1910. *On protozoal parasites of the rat and spirochaetal infection*. Report of Public Health Department, Corporation of London. London, 1919. Pathology of streptothrix infections. Allbutt and Rolleston's *System of Medicine*, 1906, 2, 302. Poisoning by arsenobenzol compounds. *Brit med J*. 1920, 1, 864.