Robert Stanley Mitchell (1877-1930) was born at Derby, the son of Robert Thomas Mitchell, a printer compositor, and his wife, Katharine née Ackerman. In 1903, Robert married Grace Elshaw. In the Census (1911), Robert and Grace lived at Hillsborough, when his occupation was ‘foreman, engineer’ at a cutlery works. In about 1914, he began to manufacture safety razors at Unity Works, Langsett Road, Walkley. The firm became a private limited company in 1927, with £5,000 capital, an....