Map of the great Air Line route : Ohio & Mississippi Railway and connections.

Map shows major cities and towns, military posts, state and territory boundaries, and railroad companies and existing and proposed rail routes across eastern half of the continental United States; Dakota and Indian Territories. Relief shown by hachures. Scale not given.
Date: 1878
Creator: Ohio and Mississippi Railway Company (1867-1893)
System: The Portal to Texas History

Sketch II showing the progress of the survey in Section No. VIII: From 1846 to 1871.

Map shows survey measurements along the Gulf Coast from Texas to Alabama. Scale [1:600,000].
Date: 1871
Creator: U.S. Coast and Geodetic Survey
System: The Portal to Texas History

[Maps of the Southern and Middle Atlantic States]

Map shows state boundaries, existing and proposed railroads, cities, major towns, swamps, and notable physical features. Relief shown by hachures. Scale [ca. 1:6,336,000] and [ca. 1:4,118,400].
Date: [1877..1881]
Creator: unknown
System: The Portal to Texas History