William Hey III, son of William Hey II (qv), was born on December 23rd, 1796, the eldest of four brothers. He was appointed Surgeon to the Leeds Infirmary in 1830, and succeeded to the practice of his father on the latter's death in 1844; he held the position of Surgeon until 1851, when he became Consulting Surgeon. In association with Samuel Smith, William Price, Thackeray Teale, and Williamson, he was instrumental in founding the Leeds School of Medicine, where he lectured on surgery. He practised at 1 Albion Place, and about 1840 was joined for a time by his cousin, Samuel Hey (qv). In 1843 he read a Retrospective Address in Surgery at the 11th Anniversary of the Provincial Medical and Surgical Association held in Leeds. He was President of the Surgical Section at the 37th Annual Meeting of the British Medical Association at Leeds. William Hey III early promoted the cultivation of music in Leeds, and was an active member of the Philosophical and Literary Society, over which his grandfather had presided at its foundation in 1818, three months before his death. He took great interest in the *Transactions* of the Society, promoted the formation of the museum, and was a member of the Town Council as a moderate Conservative and staunch Churchman. He died of heart disease at Gledhow Wood, Leeds, on May 10th, 1875; only one of his brothers, the Rev S Hey, Rector of Sawley, Derbyshire, survived him. He married in 1821 a daughter of Thomas Roberts; she died without family in 1867. A photograph of him is in the College Collection.