Map shewing [sic] vicinity of Harper's Ferry, Virginia, and the upper Potomac River.
Concerns an area of Maryland and Virginia between the towns of Cumberland, Md., on the west and Harpers Ferry, Va. [now W.Va.], on the eastern side of the map. Sneden details the mountainous topography highlighting rivers, especially the Potomac River, and including the rail system through this area. Just north of Winchester, Va., there is a line of unidentified Confederate troops. The only other ...
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.
Sneden, Robert Knox
[Map of the lower Potomac River showing picket lines, January 1862]
Concerns Union and Confederate pickets positioned north and south around Pohick Church and Accotink in Fairfax County, Va., in January 1862. Includes a balloon pictured near Pohick Church and labelled as "Decr. 1861," but as noted in Sneden's diary text on pp. 374-376, he indicates that Professor Thaddeus S. C. Lowe also was using the surveillance hot-air balloons in the same area in January ...