Born 4 September 1863, the seventh child and third son of George Mahood, MD, of Enniskillen, Co Fermanagh, Ireland, and his wife Mary Jane Bell. He was educated at Portora Royal School, Enniskillen, and was an exhibitioner of the Royal University of Ireland, through which he graduated in 1888. He was trained in the Ledwich School of the Royal College of Surgeons in Ireland, and in the School of Physic of Trinity College, Dublin, and at the Meath and Coombe Hospitals. Coming to London he worked at St Bartholomew's Hospital, from which he took the English Conjoint qualification in 1890. After a period in Birmingham, where he was house surgeon at Queen's Hospital, senior assistant resident medical officer at the City Infectious Hospital, and held various appointments at Queen's College, Mahood settled in North Devon. He practised for a few years at Appledore, and was medical officer for the Northam division of the Bideford Union and surgeon to Bideford Hospital. Between 1903 and 1913 he was travelling, and then returned to Tiverton, Devonshire. During the period of the first world war, 1914-19, he was assistant physician at Duff House, Banff, a private hospital directed by Sir Edmund I Spriggs, FRCP. While there he took a keen interest in the Banffshire Field Club, of which he became president. He drew up a list of local birds, and wrote a guide-book to the district. After the war he went back to Tiverton, and later moved to Combe Martin, Devon. Mahood married twice: (1) on 1 July 1898 Caroline Eva Stanley Scott, daughter of Lieutenant-Colonel Stanley Scott, Bombay Staff Corps, of Northam, Devon; Mrs Mahood died on 5 October 1923, leaving one son who survived his father; (2) on 18 September 1933 May Emily Parker, third daughter of Joseph Parker, JP, of Buxton, Norfolk. He then retired to Haynford, near Norwich, where he died on 23 November 1949, aged 86. Mrs Mahood survived him, but without children. Publications: Musical sand. *Transactions of the Banffshire Field Club* 1915. Banffshire birds. *Scottish Naturalist*, 1915. *Banff and the District*, 1916. Birds of Banffshire and Speyside. *Transactions of the Banffshire Field Club*, 1918. Urticaria from bee-stings and fish poisoning. *Lancet*, 1934, 2, 163.