When the duke of Burgundy had repaired the bridge at l'Isle-Adam, the greater part of his army passed over under the command of the lords de Fosseux, de Vergy, and de Salnoe, and were lodged in the open fields, and under hedges and bushes, within the distance of a league from where they had crossed the river. On the morrow they decamped, and marched in battle-array to Beaumont-sur-Oise, and quartered themselves in the town, and around the castle, in spite of the resistance made by those within it. Sir Jennet de Poix, with four hundred combatants under his banner, advanced to a village a league further, and on the road toward Paris, which he fortified, and kept possession of until the whole army was dislodged. The duke of Burgundy was encamped on the other side of the river, and had his artillery pointed to batter the castle of Beaumont from across the Oise; and they kept up so brisk an attack that the castle was damaged in several places. The besieged, seeing they were in danger of being taken by storm, surrendered to the will of the duke of Burgundy. Fifty two persons were found in the castle, nine of whom were beheaded, and their bodies hung by the arms to trees: the rest or the greater part, were set at liberty on paying a heavy ransom; and the lord de Vergy, marshal of the army, received, by right of his office, all the effects that were found in the castle. The duke of Burgundy revictualled this castle, and gave the command of it to a burgundian gentleman called John de Torsenay. After this conquest, the duke ordered the van, which was on the opposite side of the river, to advance toward Paris, and to quarter themselves at the abbey of Morbuisson, and other places near to the town of Pontoise, while the duke should encamp on the side toward Beauvais, and by this means the town would be surrounded on all sides. On their arrival, the garrison made a sally, but were repulsed and driven back; and the duke soon after had his artillery pointed against the gates of Pontoise, making other preparations to subdue them. When the townsmen noticed these things, they opened a parley, and, five days after, surrendered the place to the duke, on condition that their lives and fortunes should be spared. They also promised not to bear arms against him until Christmas-day ensuing; but this they did not keep, for on his arrival at Paris they continued their warfare against him as before.