Map showing the connection of the coal-field of Allegany with the canal and rail-road improvements of the Potomac.

Outline map of western Maryland showing drainage, major roads, cities, and the Baltimore and Ohio Railroad and Canal. A shaded area indicates the coal field.
Scale ca. 1:330,000.
LC Railroad maps, 231
Description derived from published bibliography.
Available also through the Library of Congress Web site as a raster image.