Abraham Lincoln.  Salt print.  Ostendorf O-55.  The earliest presidential portrait of Lincoln.
Unknown author<span style="display: none;">Unknown author</span>
<a href="https://en.wikipedia.org/wiki/Christie%27s" class="extiw" title="en:Christie's">Christie's</a>, LotFinder:  entry  <a rel="nofollow" class="external text" href="https://www.christies.com/LotFinder/lot_details.aspx?intObjectID=5176324">5176324</a>