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 National Forest forests. Its headquarters are in Rolla, Missouri. Some unique features of the Mark Twain include Greer Spring, which is the largest spring on National Forest land and part of the Eleven Point National Scenic River, and pumps an average of 214 million gallons of water per day into the river. The public can also visit the Glade Top Trail National Scenic Byway, which offers views of over to the Boston Mountains in Arkansas. The 350-mile Ozark Trail system winds through much of the National Forest. The Mark Twain National Forest, as we know it today, was created on February 17,