Front view of the <a href="https://en.wikipedia.org/wiki/en:Christmas_Bullet" class="extiw" title="w:en:Christmas Bullet">Christmas Bullet</a> strutless biplane; this photo (published in <i>Flight International</i> on February 13, 1919) clearly shows the absence of struts and wires between the wings.
Unknown author<span style="display: none;">Unknown author</span>
between 1918 and 1919 <div style="display: none;">date QS:P,+1918-00-00T00:00:00Z/8,P1319,+1918-00-00T00:00:00Z/9,P1326,+1919-00-00T00:00:00Z/9</div>
<a rel="nofollow" class="external free" href="http://www.flightglobal.com/pdfarchive/view/1919/1919%20-%200207.html">http://www.flightglobal.com/pdfarchive/view/1919/1919%20-%200207.html</a> <i>Flight International</i> Archives, <i>Flight International</i> February 13, 1919.