A reproduction of a hand-drawn sketch of the Columbia River by William Clark. The map also indicates camping places on the return journey in April, 1806. Originally issued in volume titled: Atlas accompanying the original journal of the Lewis and Clark expedition, 1804-1806, edited by Reuben Gold Thwaites (New York : Dodd, Mead & Company, 1905). Map 32, pt. 2. Item has also been identified as bb017544.

A map depicting Lewis and Clark's route from the Mississippi to the Pacific Ocean. The map shows the relationship between the sources of the Missouri River, Columbia River, and the Rocky Mountains and the locations of Native American tribal groups. The map was copied by Samuel Lewis from William Clark's original drawing. Relief is shown by hachures.

A map depicting the Oregon Territory. The map was drawn to accompany Samuel Parker's book, "Journal of an exploring tour beyond the Rocky Mountains," in 1838. The map shows what is today the Northwestern United States from the Great Lakes Region to the Pacific Coast. The map also shows the general locations of Native American tribal groups. Relief is shown by hachures.