Portrait derived from <a href="//commons.wikimedia.org/wiki/File:Charles_Von_H%C3%BCgel_(1903).pdf" title="File:Charles Von Hügel (1903).pdf"><i>Charles Von Hügel, April 25, 1795 - June 2, 1870 (1903)</i></a>, a biography of the melancholic adventurer and naturalist by his son Anatole von Hügel. The caption is "CHARLES VON HÜGEL.
<p>FROM A PAINTING BY JOSEPH NEUGEBAUER.
</p>
Florence, 1851.".
<bdi><a href="https://www.wikidata.org/wiki/Q19569500" class="extiw" title="d:Q19569500"><span title="Austrian painter (1810-1895)">Josef Neugebauer</span></a>
</bdi>
1851
A copy of the book held at New York Public Library, digitised by google and made available at the Internet Archive (archive.org) at this <a rel="nofollow" class="external text" href="https://archive.org/details/charlesvonhgela00hggoog">location</a>.