Mouse over photos to see caption (file name) at bottom of browser. Some truly amazing scenes, plus portraits of most of the major figures.
See Lincoln at the 2nd Innaugural, with, apparently, Booth in the photo, in the crowd above him.
Lots of scenes from Antietam and Gettysburg - places I am familiar with, having both studied the battles and visited the fields.
Also noteworthy: the under-construction Capitol and Washington Monument. Check it out.