DocsTeach is a product of the National Archives education division and is made possible in part through the National Archives Foundation. The site provides access to primary source materials related to the Lewis and Clark expedition.

National Archives and Records Administration

This website makes available the text of the Nebraska edition of the Lewis and Clark journals, edited by Gary E. Moulton. Moulton's edition—the most accurate and inclusive edition ever published—is one of the major scholarly achievements of the late twentieth century. This site is is sponsored by the National Endowment for the Humanities, the Center for Great Plains Studies, the University of Nebraska Center for Digital Research in the Humanities, and University of Nebraska Press.

The National Park Service invites you to explore stories, places, and the people involved in Lewis & Clark Expedition.

The journals of Lewis and Clark housed at the American Philosophical Society constitute the major source of information on the transcontinental scientific expedition of the Corps of Discovery in 1804-1806. The bulk of the collection is comprised of 18 "codices" bound variously in red morocco leather, brown leather, or marbled-paper boards, and 12 loose leaf codices, these were kept alternately by Captains Meriwether Lewis and William Clark during their journey with the Corps of Discovery. Entries on the voyage west were made almost daily with few exceptions, though on the return voyage, there are several, occasionally substantial gaps.

The Monticello website presents a number of essays about the Lewis and Clark Expedition and the Louisiana Purchase.

U.S. House of Representatives: Historical Highlights, January 18, 1803. On this date, President Thomas Jefferson sent a secret letter to Congress that requested financing for a transcontinental exploration that became the Lewis and Clark expedition of 1804–1806.

National Archives and Records Administration