<bdi><a href="https://en.wikipedia.org/wiki/en:Charles_Frederic_Ulrich" class="extiw" title="w:en:Charles Frederic Ulrich"><span title="American art painter (1858-1908)">Charles Frederic Ulrich</span></a>
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1. <a rel="nofollow" class="external text" href="http://www.artnet.com/artists/lotdetailpage.aspx?lot_id=2852F174BA532D71">Artnet</a><br>2. <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=1635049">1635049</a> (sale 9254, lot 39, New York, 30 November 1999)