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 his brother Richard continued to trade at Smithfield.  However, he died on 15 February 1838 after falling from his horse near Rotherham.  The fall was supposedly caused by a fit (Sheffield Independent, 17 February 1838).  He left £100 to Sheffield Infirmary.  The business passed to his nephew, Thomas (1806-1855), who in 1841 was listed as a fish hook knife manufacturer at 43 Smithfield.  His manager was Richard Nash, who in 1833 had been listed as a table, pen and pocket knife manufacturer at Swallow’s Yard, Smithfield.  Thomas Didsbury was last listed as a fish hook and spring knife manufacturer in 1852, when he was living at Clifton Cottage, Rotherham.  He died on 8 March 1855, aged 48.  An obituary described him as a corn merchant and one of the feoffees of common land at Rotherham (Sheffield Independent, 17 March 1855).