Walter had made the best preparation possible for the defence. In the courtyard behind the breach his men had since morning been driving a circle of piles, connected by planks fastened to them. These were some five feet high, and along the top and in the face next to the breach sharp-pointed spikes and nails had been driven, rendering it difficult in the extreme for anyone to climb over. As the column of the assailants approached Walter placed his archers on the walls on either side of the breach, while he himself, with his men-at-arms, took his station in the gap and faced the coming host. The breach was some ten yards wide, but it was only for about half this width that the mound of broken stones rendered it possible for their enemies to assault, consequently there was but a space of some fifteen feet in width to be defended. Regardless of the flights of arrows, the French, headed by their knights and squires, advanced to the assault, and clambering up the rough stones attacked the defenders. Walter, with Ralph and three of his best men-at-arms, stood in the front line and received the first shock of the assault. The roughness and steepness of the mound prevented the French from attacking in regular order, and the very eagerness of the knights and squires who came first in contact with their enemies was a hindrance to them. When the columns were seen gathering for the assault Walter had scattered several barrels full of oil and tar which he found in the cellars over the mound in front of the breach, rendering it greasy and slippery, and causing the assailants to slip and stagger and many to fall as they pressed forward to the assault. Before the fight commenced he had encouraged his soldiers by recalling to them how a mere handful of men had at Cressy withstood for hours the desperate efforts of the whole of the French army to break through their line, and all were prepared to fight to the death. The struggle was a desperate one. Served by their higher position, and by the difficulties which the French encountered from the slipperiness of the ground and their own fierce ardour to attack, Walter and his little band for a long time resisted every effort. He with his sword and Ralph with his heavy mace did great execution, and they were nobly seconded by their men-at-arms. As fast as one fell another took his place. The breach in front of them was cumbered with dead and red with blood. Still the French poured upwards in a wave, and the sheer weight of their numbers and the fatigue caused by the tremendous exertions the defenders were making began to tell. Step by step the English were driven back, and Walter saw that the defence could not much longer be continued. He bade one of his men-at-arms at once order the archers to cease firing, and, leaving the walls, to take refuge in the keep, and thence to open fire upon the French as they poured through the breach.