Stephenson,
George 1781-1848; Eng. engineer: developed the steam locomotive
Stephenson,
Robert 1803-59; Eng. engineer & bridge builder: son of George
See Stephenson in American Heritage Dictionary 4
(stēˈvən-sən), George 1781-1848.
British railway pioneer who built a practical steam locomotive (1814) and the first passenger railway (1825). His son Robert (1803-1859) built railroads, locomotives, and bridges.