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 since 2011, and has spent most of that time sitting in dry dock. Tokyo Disneyland's "Mark Twain" riverboat is so large that it is required by law to be registered. Its home port is listed as Urayasu. The steam engine machinery used on this riverboat are from the now-destroyed "Admiral Joe Fowler Riverboat" at the Magic Kingdom. From the time of its opening until September 2006 its sponsor was Nippon Suisan Kaisha. "Mark Twain" riverboat burns biodiesel fuel to heat its boiler, continuously heating water into steam, which is then routed to two pistons that turn the paddlewheel. Spent exhaust