During the whole month of August he proceeded steadily with his sapping and mining. By the middle of the month his lines had come through the ditch, which he drained of water into the counterscarp. By the beginning of September he had got beneath the principal fort, which, in the course of three or four days, he expected to blow into the air. The rainy weather had impeded his operations and the march of the relieving army. Nevertheless that army was at last approaching. The regiments of Mondragon, Charles Mansfeld, Gonzaga, Berlaymont, and Arenberg had been despatched to reinforce Verdugo. On the 23rd August, having crossed the Rhine at Rheinberg, they reached Olfen in the country of Benthem, ten miles from Coeworden. Here they threw up rockets and made other signals that relief was approaching the town. On the 3rd of September Verdugo, with the whole force at his disposal, amounting to four thousand foot and eighteen hundred horse, was at the village of Emblichen, within a league of the besieged city. That night a peasant was captured with letters from Verdugo to the Governor of Coeworden, giving information that he intended to make an assault on the besiegers on the night of 6th-7th September. Thus forewarned, Maurice took the best precautions and calmly within his entrenchments awaited the onslaught. Punctual to his appointment, Verdugo with his whole force, yelling "Victoria! Victoria!" made a shirt-attack, or camiciata--the men wearing their shirts outside their armour to distinguish each other in the darkness--upon that portion of the camp which was under command of Hohenlo. They were met with determination and repulsed, after fighting all night, with a loss of three hundred killed and a proportionate number of wounded. The Netherlanders had but three killed and six wounded. Among the latter, however, was Lewis William, who received a musket-ball in the belly, but remained on the ground until the enemy had retreated. It was then discovered that his wound was not mortal--the intestines not having been injured--and he was soon about his work again. Prince Maurice, too, as usual, incurred the remonstrances of the deputies and others for the reckless manner in which he exposed himself wherever the fire was hottest He resolutely refused, however, to permit his cavalry to follow the retreating enemy. His object was Coeworden--a prize more important than a new victory over the already defeated Spaniards would prove--and this object he kept ever before his eyes. This was Verdugo's first and last attempt to relieve the city. He had seen enough of the young prince's tactics and had no further wish to break his teeth against those scientific entrenchments. The Spaniards at last, whether they wore their shirts inside or outside their doublets, could no longer handle the Dutchmen at pleasure. That people of butter, as the iron duke of Alva was fond of calling the Netherlanders, were grown harder with the pressure of a twenty-five years' war.