Bernard De Voto

In 1803, the great expanse of the Louisiana Purchase was an empty canvas. Keenly aware that the course of the nation's destiny lay westward?and that a ?Voyage of Discovery? would be necessary to determine the nature of the frontier?President Thomas Jefferson commissioned Meriwether Lewis to lead an expedition from the Missouri River to the northern Pacific coast and back. From 1804 to 1806, accompanied by co-captain William Clark, the Shoshone guide...