Samuel Langhorne Clemens first used this pen name in 1863 while with the Territorial Enterprise in Virginia City, Nev.
Twain's journey ended in the silver-mining town of Virginia 
City, Nevada, ... he first used the pen name that would become famous; on 
February 3, 1863, he ... His first success as a writer came when his humorous tall 
tale, "The... [DOC] [TLE] Mark Twain in Nevada - Wikipedia [PAR] The use of the pen name of Mark Twain first occurred in Samuel Clemens's 
writing while in the Nevada Territory ....