At the First World Jamboree, 500 Wolf Cubs perform a Grand Howl in the arena at Olympia, London.
Unknown author<span style="display: none;">Unknown author</span>
2014-03-13 19:36:33
<a rel="nofollow" class="external free" href="http://www.pinetreeweb.com/1920-wj1-tjb-04.htm">http://www.pinetreeweb.com/1920-wj1-tjb-04.htm</a> from The Jamboree Book, The Boy Scouts' Association, London 1920