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 Lake there are thousands of prime hunting grounds easily accessible from hunter/fisherman parking lots located throughout the area. Near the lake, north of the village of Florida, are a group of prehistoric burial mounds; this site, known as the Crigler Mound Group, is listed on the National Register of Historic Places. Mark Twain Lake Mark Twain Lake is located in Ralls County, Missouri and Monroe County, Missouri. It was created by the Clarence Cannon Dam (formerly called "Joanna Dam") impounding the Salt River and is located about southwest of Hannibal. The lake was named for Missouri author Mark Twain and part