Mark Twain three of his siblings survived childhood: Orion (1825–1897), Henry (1838–1858), and Pamela (1827–1904). His sister Margaret (1830–1839) died when Twain was three, and his brother Benjamin (1832–1842) died three years later. His brother Pleasant Hannibal (1828) died at three weeks of age. When he was four, Twain's family moved to Hannibal, Missouri, a port town on the Mississippi River that inspired the fictional town of St. Petersburg in "The Adventures of Tom Sawyer" and the "Adventures of Huckleberry Finn". Slavery was legal in Missouri at the time, and it became a theme in these writings. His father was an attorney
Mark Twain Birthplace State Historic Site Mark Twain Birthplace State Historic Site The Mark Twain Birthplace State Historic Site is a publicly owned property in Florida, Missouri, maintained by the Missouri Department of Natural Resources, that preserves the cabin where the author Samuel Langhorne Clemens was born in 1835. The cabin is protected within a modern museum building that also includes a public reading room, several of Twain's first editions, a handwritten manuscript of "The Adventures of Tom Sawyer", and furnishings from Twain's Connecticut home. The historic site is adjacent to Mark Twain State Park on a peninsula at the western end of man-made Mark Twain