Portions of the military departments of Virginia, Washington, Middle & the Susquehanna,
Scale 1:200,000. LC Civil War Maps (2nd ed.), 47.2 Roughly drawn base map covering southern Pennsylvania, Maryland, Northern Virginia, and Washington D. C., and indicating populated places, common roads and turnpikes, contemplated and existing railroads, canals, and relief by hachures. Description derived from published bibliography. Available also through the Library of Congress web site as raster image.
United States. Army. Corps of Engineers - Callahan, Denis