The besiegers had now pushed their approaches as far as the ditch, and vigorously cannonaded the fortifications from the abandoned batteries. One tower was entirely overthrown, but this did not facilitate an assault, as it fell sidewise upon the wall, and not into the ditch. Notwithstanding the continual bombardment, the walls had not suffered much; and the fire balls, which were intended to set the town in flames, were deprived of their effect by the excellent precautions adopted against them. But the ammunition of the besieged was nearly expended, and the cannon of the town gradually ceased to answer the fire of the Imperialists. Before a new supply could be obtained, Magdeburg would be either relieved, or taken. The hopes of the besieged were on the stretch, and all eyes anxiously directed towards the quarter in which the Swedish banners were expected to appear. Gustavus Adolphus was near enough to reach Magdeburg within three days; security grew with hope, which all things contributed to augment. On the 9th of May, the fire of the Imperialists was suddenly stopped, and the cannon withdrawn from several of the batteries. A deathlike stillness reigned in the Imperial camp. The besieged were convinced that deliverance was at hand. Both citizens and soldiers left their posts upon the ramparts early in the morning, to indulge themselves, after their long toils, with the refreshment of sleep, but it was indeed a dear sleep, and a frightful awakening. Tilly had abandoned the hope of taking the town, before the arrival of the Swedes, by the means which he had hitherto adopted; he therefore determined to raise the siege, but first to hazard a general assault. This plan, however, was attended with great difficulties, as no breach had been effected, and the works were scarcely injured. But the council of war assembled on this occasion, declared for an assault, citing the example of Maestricht, which had been taken early in the morning, while the citizens and soldiers were reposing themselves. The attack was to be made simultaneously on four points; the night betwixt the 9th and 10th of May, was employed in the necessary preparations. Every thing was ready and awaiting the signal, which was to be given by cannon at five o'clock in the morning. The signal, however, was not given for two hours later, during which Tilly, who was still doubtful of success, again consulted the council of war. Pappenheim was ordered to attack the works of the new town, where the attempt was favoured by a sloping rampart, and a dry ditch of moderate depth. The citizens and soldiers had mostly left the walls, and the few who remained were overcome with sleep. This general, therefore, found little difficulty in mounting the wall at the head of his troops.