Since the time of Columbus, explorers dreamed of a water passage across the North American continent.
Along the way they filled hundreds of notebook pages with observations of the geography, Indian tribes, and natural history of th.
Meriwether Lewis and William Clark led this expedition of 1804-6.
He conceived the Corps of Discovery to travel up the Missouri River to the Rocky Mountains and westward along possible river routes to the Pacific Ocean.
President Thomas Jefferson shared this dream.
Since the time of Columbus, explorers dreamed of a water passage across the North American continent