Richard Trevithick (1771-1833), British mechanical engineer and inventor, and one of the pioneers of railroad locomotion. Trevithick was born in Illogan, near Camborne-Redruth. In 1796 he exhibited models of high-pressure, noncondensing steam engines, which were an improvement on the low-pressure engines developed by the Scottish inventor James Watt. On Christmas Eve, 1801, Trevithick put into operation the first steam-propelled vehicle ever to carry passengers. In 1804 he made the first application of steam to the hauling of loads on a railway when his steam locomotive carried ten tons of iron about 15 km (about 9.5 mi), from Merthyr Tydfil to Abercynon. His success led to the construction of further steam locomotives operating on rails. He is considered by many the real inventor of the locomotive steam engine (see Locomotive).