The duke ordered a number of boats to be sent round from Nettuno, a place on the coast, of which he had got possession. By means of these he formed a bridge, over which he passed a small detachment of his army, together with his battering train of artillery. The hamlet was easily taken, but, as the citadel refused to surrender, Alva laid regular siege to it. He constructed two batteries, on which he planted his heavy guns, commanding opposite quarters of the fortress. He then opened a lively cannonade on the outworks, which was returned with great spirit by the garrison. Meanwhile he detached a considerable body of horse, under Colonna, who swept the country to the very walls of Rome. A squadron of cavalry, whose gallant bearing had filled the heart of the old pope with exultation, sallied out against the marauders. An encounter took place not far from the city. The Romans bore themselves up bravely to the shock; but, after splintering their lances, they wheeled about, and, without striking another blow, abandoned the field to the enemy, who followed them up to the gates of the capital. They were so roughly handled in their flight, that the valiant troopers could not be induced again to leave their walls, although Cardinal Caraffa--who had a narrow escape from the enemy--sallied out with a handful of his followers, to give them confidence.[152] During this time Alva was vigorously pressing the siege of Ostia; but though more than a week had elapsed, the besieged showed no disposition to surrender. At length, the Spanish commander, on the seventeenth of November, finding his ammunition nearly expended and his army short of provisions, determined on a general assault. Early on the following morning, after hearing mass as usual, the duke mounted his horse, and, riding among the ranks to animate the spirits of his soldiers, gave orders for the attack. A corps of Italians was first detached, to scale the works; but they were repulsed with considerable loss. It was found impossible for their officers to rally them, and bring them back to the assault. A picked body of Spanish infantry was then despatched on this dangerous service. With incredible difficulty they succeeded in scaling the ramparts, under a storm of combustibles and other missiles hurled down by the garrison, and effected an entrance into the place. But here they were met with a courage as dauntless as their own. The struggle was long and desperate. There had been no such fighting in the course of the campaign. At length, the duke, made aware of the severe loss sustained by his men, and of the impracticability of the attempt, as darkness was setting in, gave the signal for retreat. The assailants had doubtless the worst of it in the conflict; but the besieged, worn out with fatigue, with their ammunition nearly exhausted, and almost without food, did not feel themselves in condition to sustain another assault on the following day. On the nineteenth of November, therefore, the morning