Shows the names and configurations of Union fortifications on the Maryland side of the Potomac River in 1862, and in some cases the name of the regiment that built the structure. This appears to be a companion piece to the image on p. 43.
Chart of the Potomac River from Washington, D.C. to its entrance into the Chesapeake Bay. Chart indicates soundings, tides, lighthouses, and the shoreline configuration. Description derived from published bibliography. Maps numbered 20-23 in upper left corners. Seal of U.S. Coast Survey Office printed below the map title. Similar to no. 35.2, LC Civil War maps (2nd ed.) This item is in the Map Collection ...
United States Coast Survey - Bache, A. D. (alexander Dallas)