Map of the seat of war exhibiting the surrounding country, the approaches by sea & land to the capitol of the United States, and the military posts, forts, &c [cartographic material] / T. Sinclair's lith., Phila
"Entered according to Act of Congress in the year 1861 by Jacob Monk.", General map of eastern Virginia, Maryland, and Delaware., Includes "Table of distances from Washington by rail road.", and Description derived from published bibliography.
Available also through the Library of Congress web site as raster image.