H. H. Knight was at Merton and Exeter Colleges, graduated in 1817 with a first class in Lit. Hum., and was Fellow of the Queen's College 1820-7. On 31 Dec. 1826 he was instituted rector of Neath, and served his cure with great diligence till Dec. 1854, when he succeeded his elder brother in what was practically the family living of Newton Nottage. He resided at Nottage Court, which indeed he seems always to have regarded as his home (his mother lived there during her widowhood), and there he d., unmarried, 30 Sept. 1857. The living then passed to the fourth of the brothers, EDWARD DODDRIDGE KNIGHT (1806?-1873), who also occupied Nottage Court which is still in the hands of his descendants in the female line. The three brothers’ (eldest) sister, ANNE BASSETT KNIGHT (1794-1825), m. the Rev. John Blackmore, and was the mother of the novelist Richard Doddridge Blackmore (1825-1900), who when young spent much of his time at Nottage Court with his uncle Henry Hey Knight, is said to have depicted him in one of his novels, and benefited considerably by his will. His novel The Maid of Sker was begun at Nottage Court and is largely concerned with the neighbourhood.

It is as an antiquary that H. H. Knight deserves to be remembered. He was one of the earliest and most prominent members of the Cambrian Archaeological Association, and was the author of several antiquarian papers (list in Phillips, Hist. of the Vale of Neath, 115). The most important of these is the very valuable ‘Account of Newton Nottage,’ published in Arch. Camb. in 1853 (90-8, 161-80, 229-62), which includes a history of the descent of the Tythegston and other estates of the Turbervils, the Loughers, and the Knights.