The Didsbury family lived in Rotherham and were related to Joseph Swallow. The latter’s sister, Mary Swallow (1735-1812), had married John Didsbury (1718-1798). Their sons included John (1762-1825) and Richard (1774-1838), who had been born at Wickersley, Rotherham. As nephews of Joseph Swallow, they inherited his fish hook knife business at Smithfield. They were listed in the Sheffield directory (1825), using Swallow’s fish hook trade mark. John died on 22 July 1825 and thereafter h....