The third World Esperanto Congress was held in 1907 in Cambridge, England. It is probable that Lord Baden-Powell was aware of the proceedings. After the first Scout camp which at Brownsea later that year, Baden-Powell was writing his book "Scouting for Boys" covering the method in which Scouting could be adapted to youth. This work appeared in the form of six small booklets, published every two weeks. The first of the series appeared on January 15, 1908 and the series had so much success that in May of the same year, the set was published in the form of a unified book. In the third book of the series, Baden-Powell advised the Scouts as recourse to use the international language Esperanto as a "secret language of the patrol". The passage in question disappeared in some later editions, however one could read on page 202 of "Scouting for Boys", in the original version: