Mato-tope holding a lance and wearing painted and quilled shirt. Mato-tope (1784 - July 30, 1837) was the second chief of the Mandan tribe to be known as Four Bears, a name he earned after charging the Assiniboine tribe during battle with the strength of four bears. Around 1830 the trading post Fort Clark was built less than 600 feet south of Mitutanka. At that time, Four Bears was a brave warrior among his people, famous for killing a Cheyenne chief in hand-to-hand combat. Besides the Cheyenne, Four Bears fought the Sioux, the Arikara, and the Assiniboine and once he killed two Ojibway women. The 1837 Great Plains smallpox epidemic wiped out most of Four Bears' tribe, leaving 27 (or by some accounts 100 to 150) survivors out of a former population of around 2,000. He died on July 30, 1837 after suffering from smallpox, brought to his tribe by whites. Voyage dans l'intÃ©rieur de l'AmÃ©rique du Nord, exÃ©cutÃ© pendant les annÃ©es 1832-34. Karl Bodmer (February 11, 1809 - October 30, 1893) was a Swiss printmaker, lithographer, painter, illustrator and hunter. He accompanied the German explorer Prince Maximilian zu Wied-Neuwied on his Missouri River expedition.