Samuel Langhorne Clemens first used this pen name in 1863 while with the Territorial Enterprise in Virginia City, Nev.
In 1863 he began signing his name with the pseudonym Mark Twain,
 a river... [DOC] [TLE] Samuel Langhorne Clemens (1835-1910) - The Latin Library [PAR] William Faulkner wrote he was "the first truly American writer, and all of us since 
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