MapMap showing the projected route of the Potomac and Ohio Railway. Middle Atlantic area showing drainage, cities and towns, county boundaries, coal in West Virginia and the railroads with emphasis on the main line. Incorporated by the West Virginia legislature, 1867-68.
- Contributor: G.W. & C. Colton & Co. - Potomac and Ohio Railway
- Date: 1874
MapMap showing the economic minerals along the route of the Chesapeake & Ohio Rail Way to accompany the geological report of Thomas S. Ridgway. Covers area from Richmond, Va., to the Ohio River along the route of the railroad and shows the geological sections in which minerals are found. Consolidated from the Virginia Central and Covington and Ohio Railroads in August 1868.
- Contributor: Maury, Matthew Fontaine - Ridgway, Thomas S. - Chesapeake and Ohio Railroad Company
- Date: 1872