"Map Showing the Routes of Trans-Continental Railways as Explored and as Constructed", U.S. Government

A very detailed map of the western two-thirds of the United States that shows the actual route of the Pacific Railroad "as explored and as constructed" in 1883. Red overprinting displays the route according to the survey presented to then Secretary of War, Jefferson Davis in 1855 as described in a note printed in red at lower right. The map shows very little deviation from the original surveys, thus validating the courageous efforts of the U.S. Army officers and soldiers who were given this monumental task.

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Condition: A

Folding as issued with a couple lazy fold creases. Near fine example less a hint of toning at some folds.