This is an edited orginal Matthew Brady photo to remove damaged or missing areas.  The photo has been enhanced.
<bdi><a href="https://en.wikipedia.org/wiki/en:Mathew_Brady" class="extiw" title="w:en:Mathew Brady"><span title="American photographer (circa 1823–1896)">Mathew Benjamin Brady</span></a>
</bdi>
Edited photo: 02-08-2010. Original photo: 1860-1870
Library of Congress Prints and Photographs Division. Brady-Handy Photograph