These two maps from the 1932 Atlas of the Historical Geography of the United States display overland mail routes and railroad lines in the United States during the mid-nineteenth century. The maps show the extent of railroads in 1850 and 1860 and overland mail from 1850 to 1869.
RAILROADS, 1850, AND OVERLAND MAIL, 1850-1859
RAILROADS, 1860, AND OVERLAND MAIL, 1860-1869
About this Document
Source: Atlas of the Historical Geography of the United States
Author: Charles O. Paullin and John K. Wright
Publisher: Carnegie Institute of Washington and the American Geographical Society of New York