<i>Le Gonflement d’un ballon</i> (Inflation of a Balloon), a wood engraving by Camille Bourget
Camille Bourget
<i>The International Studio,</i> 1909 (<a rel="nofollow" class="external free" href="https://archive.org/stream/internationalstu00newy10#page/156/mode/1up">https://archive.org/stream/internationalstu00newy10#page/156/mode/1up</a>)