Richard Trevithick (April 13, 1771 - April 22, 1833) was an English inventor, mining engineer, and an early pioneer of steam-powered road and rail transport. His most significant contribution was the development of the first high-pressure steam engine. Trevithick built a full-size steam road locomotive in 1801. He named his carriage 'Puffing Devil' and on Christmas Eve, he demonstrated it by successfully carrying six passengers up Fore Street and then continuing on up Camborne Hill, from Camborne Cross, to the nearby village of Beacon. His cousin and associate, Andrew Vivian, steered the machine. This is widely recognized as the first demonstration of transportation powered by steam. Vivian was granted a joint patent for high pressure engines for stationary and locomotive use in March 1802. Andrew Vivian (1759-1842) was a British mechanical engineer, inventor, and mine captain.