The whole of the 10th of June was employed by the Burgundians in completing their works in the western court of the bailey, clearing the breach, _c_, and working at a wooden movable tower, designed to attack and command the rampart between the gate and the corner tower, Q, of the castle; for this rampart, raised on the rock, could not be undermined. The duke, aware by this time of the strength of the place, and supposing the defenders to be more numerous than they really were, was unwilling henceforth to run any hazards. As far as was possible he manned the tops of the ramparts of that part of the bailey which was in his possession, succeeded in setting fire to the roofs and floors of the towers _m_ and _m'_, and commenced a mining attack on the tower _v'_. It was no longer the interest of the defenders to guard these works, which weakened them to no purpose. They therefore evacuated them, threw down the bridge uniting the eastern rampart of the bailey with the corner tower, and retired permanently within the castle. Meantime the Burgundians were working at their movable tower outside the old palisade, C, that had been destroyed, and covered the outside with fresh hides to preserve it from the Greek fire. They filled up the ditch in front of the tower _p_,[34] not without difficulty protecting themselves with fascines and mantelets. On the 20th of June the tower was completed, and the road for it constructed of strong planks firmly fastened as far as the filling up of the ditch. For the few last days the enemy had been incessantly working the catapults and two trebuchets against the crest of the defences of the castle between the gate and the tower, Q, and had tried to set fire to the hoarding and roofs; but these ramparts were higher than those of the bailey, and the baron had covered all the timbers with hides and blankets always kept wet, so that the flaming darts of the Burgundians were ineffectual against them. The roofs, too, were carefully watched. The hoarding, however, was almost entirely destroyed by the projectiles, and its _débris_ had been removed by the garrison, as only embarrassing the defence. The whole of the crown of the tower, P, was greatly damaged, especially as it did not rise above the crest of the curtain. Seeing the enemy's preparations, the baron mounted a strong mantelet of thick wood and a catapult on the platform of this tower, P, which had no roof. Then, to meet every contingency, he had a strong retrenchment made from the angle, _t_, to the opposite tower, behind the tower, Q.