[Seventh Census of the United States, Population Schedule, “Marion County, Missouri”]

Samuel Clemens’s siblings were Orion (July 17, 1825–December 11, 1897), Pamela Ann (September 13, 1827–August 31, 1904), Pleasant Hannibal (b.1828 or 1829, died at age 3 months), Margaret Lampton (May 31, 1830–August 17, 1839), Benjamin Lampton (June 8, 1832–May 12, 1842), and Henry (July 13, 1838–1858).

For a complete genealogy of the Clemens family, visit the Mark Twain Museumhttp://www.marktwainmuseum.org/content/research/twains_life_and_books.php. Also, visit "About Mark Twain" http://www.geocities.com/swaisman/parents-sibs.htm for pictures and biographies of Clemens’s siblings who reached maturity: Orion, Pamela, and Henry.