These collected letters by Mark Twain are arranged in six volumes by Albert Bigelow Paine, Samuel L. Clemens's literary executor, as a supplement to Mark Twain, A Biography, which Paine wrote. They are, for the most part, every letter written by Clemens known to exist at the time of their publication in 1917. Table of Contents: Volume I — Letters 1853-1866 Volume II — Letters 1867-1875 Volume III — Letters 1876-1885 Volume IV — Letters 1886-1900 Volume V — Letters 1901-1906 Volume VI — Letters 1907-1910 Mark Twain (pseudonym of Samuel Langhorne Clemens) (1835-1910), quintessential American humorist, lecturer, essayist, and author wrote The Adventures of Tom Sawyer.