But the storm, which had been delayed, soon burst upon them with redoubled violence. The Aglabite, who reigned in Africa, had inherited from his father a treasure and an army: a fleet of Arabs and Moors, after a short refreshment in the harbors of Sardinia, cast anchor before the mouth of the Tyber, sixteen miles from the city: and their discipline and numbers appeared to threaten, not a transient inroad, but a serious design of conquest and dominion. But the vigilance of Leo had formed an alliance with the vassals of the Greek empire, the free and maritime states of Gayeta, Naples, and Amalfi; and in the hour of danger, their galleys appeared in the port of Ostia under the command of Cæsarius, the son of the Neapolitan duke, a noble and valiant youth, who had already vanquished the fleets of the Saracens. With his principal companions, Cæsarius was invited to the Lateran palace, and the dexterous pontiff affected to inquire their errand, and to accept with joy and surprise their providential succor. The city bands, in arms, attended their father to Ostia, where he reviewed and blessed his generous deliverers. They kissed his feet, received the communion with martial devotion, and listened to the prayer of Leo, that the same God who had supported St. Peter and St. Paul on the waves of the sea, would strengthen the hands of his champions against the adversaries of his holy name. After a similar prayer, and with equal resolution, the Moslems advanced to the attack of the Christian galleys, which preserved their advantageous station along the coast. The victory inclined to the side of the allies, when it was less gloriously decided in their favor by a sudden tempest, which confounded the skill and courage of the stoutest mariners. The Christians were sheltered in a friendly harbor, while the Africans were scattered and dashed in pieces among the rocks