As the clerics were not allowed to fight, Raimbaut de Moreuil defended the cause of the Abbot of Saint-Denis in single combat with Guyon de Losenne. The Abbot of Saint-Denis, kneeling before the Bishop of Paris, takes an oath reaffirming that his cause, defended by Raimbaut, is just. Engraving by Huyot after a 15th-century miniature. "Vie Militaire et Religieuse au Moyen Age et a lEpoque de la Renaissance". Paris, 1877.