<bdi><a href="https://en.wikipedia.org/wiki/en:Heinrich_Hansen_(painter)" class="extiw" title="w:en:Heinrich Hansen (painter)"><span title="Danish painter, print dealer, and tapestry designer (1821-1890)">Heinrich Hansen</span></a>
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Unknown date<div style="display: none;">Unknown date</div>
Bruun Rasmussen auction catalog <a rel="nofollow" class="external text" href="https://bruun-rasmussen.dk/doc/dam/catalogues/879/879_29-300518.pdf">online</a>, p. 37.