Buscarel was in Rome between July 15 and September 30, 1289, and in Paris in November–December 1289. Via Buscarel, Arghun informed the European nobles, such as King Philip IV of France and Edward I of England, that Arghun would march his troops as soon as the Crusaders had disembarked at Saint-Jean-d'Acre, and that the Mongols would deliver between 20,000 and 30,000 horses and all needed supplies to the Crusaders if they would come to the Holy Land. Arghun also promised that he would deliver Jerusalem to the Europeans if Egypt was successfully conquered: