Came of Huguenot stock, an ancestor having taken refuge in England after the Revocation of the Edict of Nantes. Both his father and grandfather were members of the medical profession and practised in John Street, Golden Square, London. Educated at St George’s Hospital, he was a fellow-pupil with Sir Benjamin Brodie (q.v.), whose intimate friend he became. In 1803 entered the Guards as Assistant Surgeon, and with the 1st Battalion of the Grenadiers was present at Corunna, Nive, Nievelles, and the taking of St Sebastian. Leaving the service in 1820, he began to practise in South Audley Street, and was appointed Surgeon to the St George’s and St James’s Dispensary. He early became a member of the Apothecaries’ Company, and served all the offices of that Society, being also a Member of its Examinations Commission. Up to the year 1826, in conjunction with Dr Roderick McLeod, he was Editor of the *Medical and Physical Journal*, and was one of the first Members of the Senate of the University of London. He was an active supporter of the various benevolent medical societies, was Inspector of Anatomy, first for the Provinces and then for London, and in 1854 was appointed a Member of the Board of Health. He retired from the Inspectorship of Anatomy about the year 1856, and was given a small pension. He enjoyed at one time a good private practice, and educated a son, J T W Bacot, to the profession, who after twenty-six years’ service in the Army retired before his father’s death as Hon Deputy Inspector-General of Hospitals. John Bacot died at his residence, 4 Portugal Street, Grosvenor Square, London, on Sept 4th, 1870. At the time of his death he was Senior Fellow of the College. The *Medical Circular* of 1852 published an amusing and extremely impudent life of him up to that date. The article is notable as giving a Dickensian picture of the feelings of a candidate for the LSA entering “the cold dark shadows of that low portal in Water Lane” – in other words, Apothecaries’ Hall. The biography in its closing sentences describes Bacot as “an intelligent, judicious and honest medical politician. He is a small, plain man, of unassuming manners speaks calmly and gravely, and has been the champion of the interests of the Society of Apothecaries in the late discussion on medical reform.” Publications- *Observations on Syphilis*, London, 1821. *A Treatise on Syphilis, in which the History, Symptoms, and Method of Treating every Form of that Disease are fully Considered*. 8vo, London, 1829. *Observations on the Use and Abuse of Friction; with some Remarks on Motion and Rest, as Applicable to the Cure of Various Surgical Diseases*, 8vo, London, 1822. “A Sketch of the Medical History of the First Battalion of the First Regiment of Foot-Guards, during the Winter of 1812-1813.” – *Med.- Chir. Trans.*, 1816, vii, 373. “Case of Steatomatous Tumour under the Tongue.” – Lond. *Med. and Physical Jour*., 1826.