1770-1838 1774-1809 1805-1885 approximately1758-approximately1839 biography charbonneau clark discoveryandexploration explorers familysacagawea fiction frontierandpioneerlife history indianinterpreters jean-baptiste lewis lewisandclarkexpedition(1804-1806) meriwether pioneers sacagawea shoshoniindians shoshoniwomen toussaint trappers william