Perceiving at last that the constable was determined not to begin the battle, he sent off two detachments from the rear of his army, so that their movements should be concealed from the sight of the French. One of these, composed of archers, was to take post in the wood on the left hand of the French, the other was to move on through the wood, to come down in their rear, and to set on fire some barns and houses there, and so create a panic. He waited until noon, by which time he thought that both detachments would have reached the posts assigned to them, and then gave the orders for the advance. The archers were delighted when their commander, Sir Thomas Erpingham, repeated the order. None of them had put on his armour, and many had thrown off their jerkins so as to have a freer use of their arms either for bow or axe. Each man plucked up his stake, and the whole moved forward in orderly array until within bow-shot of the enemy. Then the archers again stuck their stakes into the ground, and, taking up their position as before, raised a mighty shout as they let fly a volley of arrows into the enemy.