<bdi><a href="https://en.wikipedia.org/wiki/en:Carl_Gustav_Carus" class="extiw" title="w:en:Carl Gustav Carus"><span title="German philosopher, physician, painter (1789-1869)">Carl Gustav Carus</span></a>
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<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=5175993">5175993</a> (sale 2135, lot 310, New York, 28 January 2009)