The waves, driven by the wind, were beating on the dyke, and it was crumbling rapidly away, and hundreds sank beneath the flood. The Zeelanders drove their vessels up alongside, and pierced them with their harpoons, or, plunging into the waves, attacked them with sword and dagger. The numbers killed amounted to not less than a thousand; the rest effected their escape to the Hague. Zoeterwoude was captured and set on fire, but Lammen still barred their path. Bristling with guns, it seemed to defy them either to capture or pass it on their way to the city. Leyderdorp, where Valdez with his main force lay, was a mile and a half distant on the right, and within a mile of the city, and the guns of the two forts seemed to render it next to impossible for the fleet to pass on. Boisot, after reconnoitering the position, wrote despondently to the prince that he intended if possible on the following morning to carry the fort, but if unable to do so, he said, there would be nothing for it but to wait for another gale of wind to still further raise the water, and enable him to make a wide circuit and enter Leyden on the opposite side. A pigeon had been despatched by Boisot in the morning informing the citizens of his exact position, and at nightfall the burgomaster and a number of citizens gathered at the watchtower. "Yonder," cried the magistrate, pointing to Lammen, "behind that fort, are bread and meat and brethren in thousands. Shall all this be destroyed by Spanish guns, or shall we rush to the aid of our friends?" "We will tear the fortress first to fragments with our teeth and nails," was the reply; and it was resolved that a sortie should be made against Lammen at daybreak, when Boisot attacked it on the other side. A pitch dark night set in, a night full of anxiety to the Spaniards, to the fleet, and to Leyden. The sentries on the walls saw lights flitting across the waters, and in the dead of night the whole of the city wall between two of the gates fell with a loud crash. The citizens armed themselves and rushed to the breach, believing that the Spaniards were on them at last; but no foe made his appearance. In the morning the fleet prepared for the assault. All was still and quiet in the fortress, and the dreadful suspicion that the city had been carried at night, and that all their labour was in vain, seized those on board. Suddenly a man was seen wading out from the fort, while at the same time a boy waved his cap wildly from its summit. The mystery was solved. The Spaniards had fled panic stricken in the darkness. Had they remained they could have frustrated the enterprise, and Leyden must have fallen; but the events of the two preceding days had shaken their courage. Valdez retired from Leyderdorp and ordered Colonel Borgia to evacuate Lammen.