Additional Resources

Primary Sources:

1. The journals of Lewis and Clark 
2. Astoria, or, Anecdotes of an enterprise beyond the Rocky Mountains by Washington Irving
3. Narrative of the United States Exploring Expedition during the years 1838, 1839, 1840, 1841, 1842 by Charles Wilkes.

Secondary Sources:

1. Columbia's river: the voyages of Robert Gray, 1787-1793 by J. Richard Nokes
2. Hail, Columbia!: Robert Gray, John Kendrick, and the Pacific fur trade by John Scofield
3. The corps of discovery: staff ride handbook for the Lewis and Clark expedition by Charles D. Collins, Jr.
4. Undaunted courage: Meriwether Lewis, Thomas Jefferson, and the opening of the American West by Stephen E. Ambrose
5. Astoria : John Jacob Astor and Thomas Jefferson's lost Pacific Empire : a story of wealth, ambition, and survival by Peter Stark
6. Astor and the Oregon country by Grace Flandrau
7. The Wilkes expedition : Puget Sound and the Oregon Country by Frances B. Barkan, editor
8. The Wilkes expedition; the first United States Exploring Expedition, 1838-1842 by David B. Tyler