MARK TWAIN, was the pen name of Samuel Langhorne Clemens (1835-1910), the United States’s most famous humorist and the author of popular and outstanding autobiographical works, travel books and novels. The first thirty – six years of Clemen’s life gave him experiences – as a boy in a little town in Missouri, as a steam boat pilot, as a reporter on the far western frontier, and as a traveler abroad – which he thereafter used as materials for his best and most successful writings.