White’s General Directory … of Sheffield (1860) has two spring-knife manufacturers named Needham Bros. One Needham Bros was in Milton Street; the other was at Cavendish Works, Broomhall Street. No family connection apparently existed. The partners at Cavendish Works were Henry William Needham (c.1821-1877?) and Charles Needham (c. 1825-?). They were the sons of William Needham, who had been born in Derbyshire in about 1790, and his wife Harriet. William was a sprin....