The peace of the island having been finally assured after much bloodshed, the efforts of the emirs were directed to the extension of their empire in Italy. Political necessity rather than inclination had compelled the rulers of the Saracen settlements in Calabria and Apulia to recognize the superior jurisdiction of the governors of Sicily. The division of those regions between so many powers of different nationalities and forms of government--imperial, republican, theocratic--was the cause of mutual distrust and irreconcilable hatred. Each held aloof from alliance or even from intercourse with the others. Their very weakness was at first the guaranty of their safety. The Moslem, however, took advantage of this circumstance to attack his adversaries in detail. On one side he drove back the Byzantines, who had begun to threaten his settlements on the Gulf of Tarentum. On another, his cavalry swept away the flocks of the Roman Campagna. The republics, restrained by the faith of treaties, and the barons, who had more than once felt the keen edge of the Moorish scimetar, preserved a prudent neutrality. The country in the vicinity of the papal metropolis for a radius of many miles suffered from these inroads. Large districts were rendered uninhabitable. An important source of the food supply of Rome was destroyed. The fury of the Moslems was, as usual, chiefly aimed at the ecclesiastical establishments. Churches and convents were destroyed, the priests butchered, the nuns hurried away to the seraglio. The fugitives who sought an asylum at Rome crowded the streets and the religious houses, and taxed to the utmost the resources of monastic hospitality and benevolence. Within the walls of the Eternal City all was trepidation and despair. An attack was hourly apprehended, the sacred machinery of the church was put in motion to avert the impending calamity, and the result invested with new and profitable credit the performance of penance, the exhibition of relics, and the solemn processions, whose influence was presumed to have effected the deliverance of the Vicar of God. It is not within the scope of this work to recount in detail the monotonous sequence of fruitless revolutions, changes of rulers, religious disputes, and inveterate animosities of sects and races which compose the history of Sicily under the Arabs. No magnificent dynasty like those of the Ommeyades at Cordova and the Abbasides at Bagdad arose in the island to promote the cause of learning and science, and to reflect imperishable lustre on the Moslem name. No great commander carried his victorious arms beyond the Apennines and the Alps. The maritime superiority acquired by the fleets of Palermo was lost in a day in the bay of Naples, and the Byzantine navy once more became supreme in the Mediterranean. No military exploit worthy of record has been preserved save the storming of Taormina, which still obeyed the Greek Emperor, in the beginning of the tenth century.