In May 1804 Meriwether Lewis, William Clark, and the Corps of Discovery embarked on a seven-thousand-mile journey with instructions from President Thomas Jeffer

For Before Lewis and Clark, A. P. Nasatir translated and annotated 239 documents relating to the history of the exploration of the Missouri River through 1804,

The Atlas of Lewis and Clark in Missouri is a splendid re- creation of the natural landscape in the days when a vast western frontier was about to be explored.