Thomas Frost (1834-1871)
1834 Born in Liverpool, son of Thomas Frost
1861 Railway wheel maker, etc, lived with his widowed mother in Derby
1864 Joined the Inst of Mech Engineers; of Canal Street Iron Works, Derby.
1866 of Canal Street Iron Works, Derby.
1867 of Wadsley Bridge Iron and Steel Works, near Sheffield; was this successor to Machen, Miller and Machen?