I have before noticed how Pierre de Regnault had taken possession of the castle of Mailly, two leagues distant from Beauvais, which he had repaired and refortified. He had with him about two hundred determined combatants, with whom he overran the countries round, seizing and carrying off to his fort all he could find, as well from those dependant on the king of France as from others. He overran, in particular, the dependances of the duke of Burgundy, the count d'Estampes, and other great lords of that party: he even at times crossed the river Somme, and advanced into Artois, twelve or fifteen leagues from his castle. He acted in like manner within the castlewicks of Peronne, Roye, and Mondidier, where he made some capital prisoners, who paid large sums for their ransoms, just the same as an enemy would have done in time of war, so that the country was grievously harrassed,—and heavy complaints were made frequently to the superior lords, who were much vexed at this conduct. The duke of Burgundy at last sent to remonstrate with the king of France on this destruction of his country, and to require that a remedy be applied.

The king gave a similar answer to what he had done before: that he was much concerned at what had happened, and would be well pleased if the duke should conquer Pierre de Regnault whenever he found him marauding on his territories, or that he would besiege him in his castle of Mailly, and drive him thence; that he would send positive orders to all his captains in that part of the country not to give him the smallest aid against the troops of the duke of Burgundy, under pain of incurring his highest indignation.

The duke was satisfied with this answer, and began to arrange his plans accordingly. He concluded a treaty with some of the english captains on the frontier of Normandy, that they should give security not to molest his men nor aid the enemy; and when he was assured that neither French nor English would take part against him in this business, he sent orders from Burgundy, where he then was, to the count d'Estampes, who had the government of Picardy, to collect as many men as he could raise, and march against the castle of Mailly. The count on this made great diligence, and assembled in a short time twelve hundred combatants, knights, esquires, and others, the most expert warriors in Picardy and in the adjoining parts. In the number were Waleran de Moreul, Guy de Roye, Jean d'Ange, the lord de Saveuses, Simon de Lalain, Jean de Haplaincourt, Charles de Rochefort, sir Colart de Mailly, and many more great lords and gentlemen.

The rendezvous was in the town of Amiens, whence they marched with a numerous train of artillery, stores, and baggage, to Beauvais. The count and great lords were handsomely received in that town, and their men were quartered in the villages round. The count d'Estampes lost no time in advancing to the castle of Mailly, and posted his men as near as he could to the gate, the strongest part of the castle, and to the lower court, which had been newly strengthened with casks and beams of timber. The garrison defended themselves courageously with cannons and other engines of war, and killed many of the count's men: among the slain was sir Matthew de Humieres. The besiegers had left the greater part of their horses in the town of Beauvais, whence and from Orleans they were daily supplied with provision.

When the artillery had made a breach in the walls of the lower court, a general and very sharp assault was made, in which great prowess was displayed on both sides; but the lord de Saveuses and his men gained the most renown. The besieged defended themselves with such obstinacy that the count, finding the conquest would be attended with too much loss, ordered a retreat, leaving behind from eight to ten dead: of the besieged, only a few were wounded.

The besieged, perceiving that they could not hold out much longer, and that they had no great hopes of succour, capitulated with the commissaries of the count to surrender the place, on being allowed to march away in safety with their arms and baggage. On the surrender of the castle, it was set on fire, and razed to the ground, and the count marched his army during Passion-week to the places they had come from. This siege of Mailly had lasted upwards of three weeks,—and the whole country that had been laid under contributions by the garrison were greatly rejoiced when it was known for certain that the castle was demolished and the garrison driven thence.