On the morning of Easter Wednesday, April 16, Mansfeld, perceiving that the enemy had thus stolen a march upon him, ordered one thousand picked troops, all Spaniards, under Aquila, Casco and other veterans, to assault this advanced post. A reserve of two thousand was placed in readiness to support the attack. The Spaniards slowly crossed the bridge, which was swaying very dangerously with the current, and then charged the entrenched camp at a run. A quarrel between the different regiments as to the right of precedence precipitated the attack, before the reserve, consisting of some picked companies of Mondragon's veterans, had been able to arrive. Coming in breathless and fatigued, the first assailants were readily repulsed in their first onset. Aquila then opportunely made his appearance, and the attack was renewed with great vigour: The defenders of the camp yielded at the third charge and fled in dismay, while the Spaniards, leaping the barriers, scattered hither and thither in the ardour of pursuit. The routed Englishmen fled swiftly along the oozy dyke, in hopes of joining the main body of the relieving party, who were expected to advance, with the dawn, from their position six miles farther down the river. Two miles long the chace lasted, and it seemed probable that the fugitives would be overtaken and destroyed, when, at last, from behind a line of mounds which stretched towards Batenburg and had masked their approach, appeared Count Hohenlo and Sir John Norris, at the head of twenty-five hundred Englishmen and Hollanders. This force, advanced as rapidly as the slippery ground and the fatigue of a two hours' march would permit to the rescue of their friends, while the retreating English rallied, turned upon their pursuers, and drove them back over the path along which they had just been charging in the full career of victory. The fortune of the day was changed, and in a few minutes Hohenlo and Norris would have crossed the river and entered Grave, when the Spanish companies of Bobadil and other commanders were seen marching along the quaking bridge.