Engraving depicting Matthew Murrays steam locomotive built for John Blenkinsop used to haul coals from Middleton Colliery to Leeds in 1812. Matthew Murray (1765-1826) an English steam engine and machine tool manufacturer; who designed and built the first commercially viable steam locomotive; the twin cylinder Salamanca. John Blenkinsop (1783-1831) an English mining engineer and inventor of steam locomotives; who designed the first practical railway locomotive. Dated 19th century. 01/01/1850