Steel engraving by James Smillie after Albert Bierstadt, proof before title, published by Edward Bierstadt, New York, 1866,
<bdi><a href="https://en.wikipedia.org/wiki/en:James_David_Smillie" class="extiw" title="w:en:James David Smillie"><span title="American painter and illustrator (1833-1909)">James David Smillie</span></a>
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second upload: <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=5068195">5068195</a><br>first upload: <a rel="nofollow" class="external text" href="http://www.donaldheald.com/s3311.html">donaldheald.com</a>