In 1863 his discovery of a human jaw, together with worked flints, in a gravel-pit at Moulin-Quignon near Abbeville seemed to vindicate Boucher de Perthes entirely; but doubt was thrown on the antiquity of the human remains (owing to the possibility of interment), though not on the good faith of the discoverer, who was the same year made an officer of the Légion d'honneur. However, the 'Moulin-Quigon jaw' was a hoax, planted by one of Boucher de Perthes' workers in response to an offer of a reward of 200 Francs for findings of human remains.