The brothers were William Palmer (1837-1906) and Edward Harridon Palmer (1840-1891).  They were the sons of Edward Palmer (a labourer) and his wife, Elizabeth.  In 1841, the brothers were living in Fitzwilliam Street with Elizabeth, who was a widower and a mangler (later she became a shop keeper).   Apparently, William and Edward served apprenticeships as spring knife cutlers and by 1868 were working together in Rockingham Street.  Palmer Bros, Cambridge Street, was listed in directories between 1880 and 1888.   Edward Palmer, Alderson Road, died on 23 April 1891, aged 51.  He left £86.   William, who later lived in Crowther Place, continued to make spring knives.  He died on 17 July 1906, aged 69, leaving £1,576.   The brothers were buried in the General Cemetery.