It was the eighth day of the investment, which appeared now to be complete (May 22nd). The baron had a secret conference with his nephew and Brother Jerome in the evening, and about six o'clock, orders were given to prepare one of the largest trebuchets, whose framing had been transported thither during the preceding night, at the western end of the lists, outside the ditch.
About two o'clock in the morning, the engine was mounted, the night being still completely dark, as it would be at that season. They then tried its range against the right-hand tower of the besiegers' contravallation, with stones; and when the proper range had been secured--a point ascertained by the noise of the projectiles that fell on the woodwork--Brother Jerome placed in the lowered pouch of the stone-propeller a barrel provided with a match, and giving orders to let go the beam of the engine, set fire to the match with a brand taken from a brasier kindled for the purpose.
With a whizzing sound, the end of the beam traced a bow of fire, and the barrel was shot forth, leaving a long and luminous trail behind it; it struck the wooden tower, and in bursting spread a sheaf of white flames which seemed to cling to the woodwork. The engine, lowered anew, sent a second barrel and a third. The wooden tower then resembled a furnace (Fig. 40).
[Illustration: FIG. 40.--NIGHT SORTIE OF THE GARRISON OF THE CASTLE.]
Great was the agitation among the guard of the besiegers, and the defenders could hear their shouts from the ramparts. Taking advantage of their confusion, Anseric had the barrier of the lists opened, and followed by two hundred men, went at full speed to the contravallation, passed through the central gate, which was but slightly guarded, and turned to the left, passing along the interior of the enemy's earthwork.
The Burgundians had betaken themselves to the tower to try to extinguish the flames. The besieged rushed upon the disorderly mass, most of them being unarmed. The baron had also gone out with a second body to protect his nephew's retreat. The duke heard the shouting from the abbey, saw the fire, and immediately gave orders to march forward. But during the last hours of night, men are not very active. Before help arrived, Anseric had had time to kill or put to flight all who were guarding the contravallation. He could therefore re-enter the lists at his leisure, and without having lost a single man; some few being wounded. Daylight revealed to the duke the smoking remains of one of his towers.
