Meanwhile, on the Prussian left, before Wavre and the Mill of Bierges, the fighting went on most vigorously. The darkness did not prevent the fury of the fight; it only seemed to add to the grimness of it. The whole of Vandamme’s Corps was now engaged, and time after time the French rushed at the barricades on the bridges. Thirteen separate assaults were beaten back by the Prussians, and no less than five times the defenders, in pursuing the routed enemy, attacked and drove them from the houses on the far side of the Dyle. Once, the French had possession of the main bridge, and had even occupied some of the neighbouring buildings, but the Prussian reserves were hurried up, and these drove out the French. Each time there seemed a chance of the enemy obtaining a footing on the left bank, the Prussian reserves, judiciously posted near at hand among the side-streets and dwellings, rushed out and overwhelmed the intruders. Four battalions defended Wavre against the whole of Vandamme’s Corps. But while the attackers were exposed at each attempt to cross the bridges, the defenders were secure behind their loop-holed walls. Only a great superiority of artillery fire, to prepare the way for the assault, and to destroy some of the nearer walls, could have made a crossing successful. A few daring Sappers might have brought up bags of powder to blow in the barricades; they could only have done so by sacrificing themselves, but heroes and brave men were not wanting. Shortage of powder, however, explains the fact that no such attempt was made. At Basse Wavre, lower down the stream, the attack had not been pressed. Excelmans’ Cavalry had been ordered to make a demonstration on that flank, but cavalry cannot cross a stream without bridge or ford. Only one French battalion, supported by a single gun and two squadrons, had shown themselves, and these were of no use without a bridge to carry them across.