Dead Confederate horse after the Battle of Antietam
<bdi><a href="https://en.wikipedia.org/wiki/en:Alexander_Gardner_(photographer)" class="extiw" title="w:en:Alexander Gardner (photographer)"><span title="Scottish photographer (1821–1882)">Alexander Gardner</span></a>
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<a rel="nofollow" class="external free" href="https://www.loc.gov/resource/ppmsca.34150/">https://www.loc.gov/resource/ppmsca.34150/</a>