Sir and ma'am, if I may quote, "At a time when shutter speed of cameras was to slow to capture action, the public's only glimpse of the action came from the sketch artists."
The LOC site has over 1700 examples of "primary eyewitness sketches of civil war scenes and events, including military personnel, battles, civilian activities, and land scapes."
These and others can be found here, http://lcweb2.loc.gov/pp/drwgquery.html
In the search box, type "civil war". Next page, click preview images.
This site is also very nice, http://www.frankleslie.com/Contents.html
The LOC site has over 1700 examples of "primary eyewitness sketches of civil war scenes and events, including military personnel, battles, civilian activities, and land scapes."
These and others can be found here, http://lcweb2.loc.gov/pp/drwgquery.html
In the search box, type "civil war". Next page, click preview images.
This site is also very nice, http://www.frankleslie.com/Contents.html