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1855 pocket map of the United States by J.H. Colton. Covers the United States from coast to coast revealing a very early configuration of the Trans Mississippi. While many modern states had not yet appeared when this map was printed, many other states are exceptionally large. Oregon, Washington Utah New Mexico, Minnesota, and Nebraska, territories all, covered vast regions. A number of extremely important emigrant routes are also noted, including the Oregon Trail, the Santa Fe Trail, and Fremont's Route. Additionally indicates the many routes proposed for the Pacific Railroad including the Stevens route far to the north, two central routes through Utah, and two southern routes through New Mexico. (Photo by: Universal History Archive/Universal Images Group via Getty Images)