pioneer English railroad engineer who assisted his uncle George Stephenson and his cousin Robert Stephenson in their work.

Educated at King William College, Isle of Man, he entered his uncle's employ on the Manchester and Leeds Railway in 1837, later served as consultant on railroad construction in New Zealand, and returned to England to assist Sir John Hawkshaw in building the East London Railway. He helped Robert Stephenson (Stephenson, Robert) build the Victoria tubular bridge across the St. Lawrence River in Canada and designed many railroad bridges in England and abroad. On Robert Stephenson's death, in 1859, he succeeded as director of the locomotive works at Newcastle.