MapUnion 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