Ivan Brunetti from "Lines on Paper" panel
Karen Green
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/klg19/7244742898/">https://www.flickr.com/photos/klg19/7244742898/</a> (<a href="//commons.wikimedia.org/wiki/File:%22Lines_on_Paper%22_panel.jpg" title='File:"Lines on Paper" panel.jpg'>original photo</a>)