More than a dozen buildings by William Henry Knowles have been listed. Around Alnwick he designed the Parish Hall (1912), 26 Bondgate Within (1914); and Lint Close (now the Friary) in Alnmouth. He was an antiquarian and his excavations included Alnwick Castle. He published “Vestiges of Old Newcastle & Gateshead” (1890), and an article on Edlingham Church. After retiring to Cheltenham in 1922, he became Chairman of Cheltenham Civic Society.