Signature of Carl Edler von Stur, from a caricature of <a href="https://en.wikipedia.org/wiki/cs:Karl_Wolfrum" class="extiw" title="w:cs:Karl Wolfrum">Karl Wolfrum</a> (1813-1888).
<bdi><a href="https://www.wikidata.org/wiki/Q23012065" class="extiw" title="d:Q23012065"><span title="Austrian painter, lithographer and caricaturist">Carl Edler von Stur</span></a>
</bdi>
1874-11-21
<a rel="nofollow" class="external text" href="http://anno.onb.ac.at/cgi-content/anno?aid=flo&amp;datum=18741121&amp;seite=1&amp;zoom=33">Der Floh, vol. VI., iss. 47</a>, digitized by Austrian National Library