Colonel <a href="https://en.wikipedia.org/wiki/Alfred_N._Duffi%C3%A9" class="extiw" title="en:Alfred N. Duffié">Alfred N. Duffié</a>
Unknown author<span style="display: none;">Unknown author</span>
File from <i><a rel="nofollow" class="external text" href="https://archive.org/stream/photographichist04mill#page/n238/mode/1up">The Photographic History of The Civil War in Ten Volumes: Volume Four, The Cavalry</a></i>. The Review of Reviews Co., New York. 1911. p. 238.