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 Riverboat located. From here, the boiler engineer controls the speed and direction of the riverboat. Steam from the boiler is used to power the paddle wheels and thus pushes the craft along its guide-way. The voyage on the Rivers of America around Tom Sawyer Island features pre-recorded narration by a riverboat guide voiced by Thurl Ravenscroft, Mark Twain (Peter Renaday), who speaks of his days piloting a riverboat, and by the (not present) "captain" of the ship, voiced by Disney voice actor Stephen Stanton. On most days, "Mark Twain" begins operation as soon the park opens. On days when "Fantasmic!" is