 He was a participant in the 5th World Scout Jamboree in Vogelenzang, Netherlands in 1937, where he was in charge of the French Delegation, inclusive of the Scouts de France, Éclaireurs Unionistes, and his own Éclaireurs de France, and wore an armband on which the badges of all three associations was embroidered.He was a recipient of the Silver Wolf.Lefèvre died shortly before the 1947 World Jamboree.