Signature of Carl Sigismund Kunth.
Carl Sigismund Kunth (signature), vectorized by <a href="//commons.wikimedia.org/w/index.php?title=User:Abi%C3%A1n&amp;action=edit&amp;redlink=1" class="new" title="User:Abián (page does not exist)">David Abián</a>
<a href="//commons.wikimedia.org/wiki/File:Kunth_sign.jpg" title="File:Kunth sign.jpg">File:Kunth sign.jpg</a>