The collection consists of two volumes. The first notebook, "Notes of Queries to William Clark, with replies," (917.3.L58.b), contains Lewis' journal of the river trip from Pittsburgh to winter camp, August 30- December 12, 1803.

Kept during the Lewis and Clark Expedition, this diary notes distances covered and a draft of suggestions for routes for the fur trade.

This microfilm contains correspondence concerning the Lewis and Clark Expedition, 1804-1806. The letters discuss financial matters of Biddle's publication and the Lewis and Clark manuscripts and the specimens collected on the expedition.

Meriwether Lewis and William Clark were explorers. This collection contains the manuscript journals kept by Lewis and Clark on their travels to the source of the Missouri River and across the continent to the Pacific Ocean. There are interlineations throughout by Nicholas Biddle, who published his narrative "History of the Expedition of Captains Lewis and Clark" (1814).