Small figure of two Vs from text.
<a href="//commons.wikimedia.org/wiki/Augustus_De_Morgan" title="Augustus De Morgan">Augustus De Morgan</a>
1872
<a rel="nofollow" class="external text" href="https://www.gutenberg.org/ebooks/26408"><i>A Budget of Paradoxes, Volume II.</i></a>, available freely at <a href="https://en.wikipedia.org/wiki/Project_Gutenberg" class="extiw" title="w:Project Gutenberg">Project Gutenberg</a>