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  • 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
  • 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
    Contours of Union forts on south side of Potomac, 1862 [map].
    Union forts on the Virginia shore
    This map shows the names and configurations of Union fortifications on the Virginia side of the Potomac River in 1862, and in some cases lists the name of the regiment that built the structure.
    • Contributor: Sneden, Robert Knox
    • Date: 1862