" Between 1870 and 1905 Mark Twain (Samuel L. Clemens) tried repeatedly, and at long intervals, to write (or dictate) his autobiography, always shelving the manuscript before he had made much progress. By 1905 he had accumulated some thirty or forty of these false starts—manuscripts that were essentially experiments, drafts of episodes and chapters; many of these have survived in the Mark Twain Papers and two other libraries. To some of these manuscripts he went so far as to assign chapter numbers that placed them early or late in a narrative which he never filled in, let alone completed. None dealt with more than brief snatches of his life story. "

― Mark Twain , Autobiography of Mark Twain: Volume 1, Reader's Edition