A. Asher & Adams' Colorado. Double-page map shows Colorado just prior to statehood. County configurations are current to 1870 with the addition of Bent and Greenwood from Las Animas in the southeast. The map displays major rivers, railroads and the progress of public surveys. A note along the Colorado/Utah border states "elevated plain, fertile, gently rolling, fresh water lakes and timber."

B. Asher & Adams' Utah. Another double-page map focused on Utah but including parts of Wyoming, Colorado and Nevada. 18 counties are noted and Salt Lake City is shown as the capital. Development is confined from the Salt Lake area down to the southwest corner along the Salt Lake, Sevier Valley and Pioche Railroad. The completed Central/ Union Pacific Railroad is shown going from Wyoming through Utah into Nevada with some spur lines going into central and northern Utah.

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Condition: B+

Light scattered foxing with faint offsetting of the titles.