• Map
    Topographical map of Washington, D.C., and vicinity. Showing the Union forts and defences built 1861-3. Detail from a printed map of the Potomac River region of Maryland and Virginia, and including Washington, D.C., which Sneden has annotated to show the locations of Union forts and picket lines.
    • Contributor: Sneden, Robert Knox
  • Map
    Map of the seat of war Covers Virginia and Maryland and portions of Delaware, Pennsylvania, New Jersey and North Carolina. Shows some fortifications. Relief shown by hachures. Sewn on to and mounted on cloth backing. "Entered by Evans & Cogswell according of the act of Congress of the Confederate States in the Clerks Office of the Distr. Court of the District of South Carolina." Confederate imprint. Includes inset. Available also ...
    • Contributor: Evans & Cogswell
    • Date: 1861
  • Map
    Rough plan of the defences of the harbour of Annapolis in Maryland
    Plan of the works for the defense of Annapolis
    Shows forts in Annapolis and along the lower Severn River. Also shows harbor and public buildings in Annapolis. Relief shown by shading. Oriented with north toward the upper left. Manuscript: Black ink, red watercolor for forts and buildings, green and brown watercolor washes for shading. Watermark: JWhathan [sp.?]. Originally drawn on 2 sheets (now conjoined). Sheet halved to enable folding. Available also through the ...
    • Contributor: Tatham, William - Winder, William Henry
    • Date: 1814
  • Map
    [Maps of the environs of forts Franklin, Alexander, and Ripley, in Montgomery County, Maryland]. Four fort vicinity sketch maps, each covering the same area, but in various stages of completion. The map with the most detail includes roads, drainage, vegetation, and fortifications. Relief shown by contours on some maps. Forts Franklin, Alexander, and Ripley were part of the defenses of Washington. Title from published Civil War bibliography. Manuscript: pen-and-ink (black, brown), blue watercolor, lead pencil. At upper left ...
    • Contributor: United States. Army. Corps of Engineers
    • Date: 186?
  • Map
    Union forts on Maryland shore
    [Contours of Union forts on the north side of the Potomac, 1862] :
    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.
    • Contributor: Sneden, Robert Knox
    • Date: 1861