This is a tweak (by me) of one of the 600+ images mounted in Flickr by the Library of Congress in the collection "Faces of the Civil War." I've read that the library expects people to rework their images in a benign way, so I may be doing more of these later if there is any interest. For comparison, the original is at http://www.flickr.com/photos/library_of_congress/5228624715/