Map of the Mississippi River from its source to the mouth of the Missouri
From: The Expeditions of Zebulon Montgomery Pike: To Headwaters of the Mississippi River, through Louisiana Territory, and in New Spain, During the Years 1805-6-7. New York: F.P. Harper, 1895.
923.9 P636c v. 3
Oregon Territory, 1846
From: Oregon Missions and Travels Over the Rocky Mountains: In 1845-46, by P.J. de Smet. New York: E. Dunigan, 1847.