An offensive alliance was concluded between Basil the Macedonian, the first of his race, and Lewis the great-grandson of Charlemagne; and each party supplied the deficiencies of his associate. It would have been imprudent in the Byzantine monarch to transport his stationary troops of Asia to an Italian campaign; and the Latin arms would have been insufficient if his superior navy had not occupied the mouth of the Gulf. The fortress of Bari was invested by the infantry of the Franks, and by the cavalry and galleys of the Greeks; and, after a defence of four years, the Arabian emir submitted to the clemency of Lewis, who commanded in person the operations of the siege. This important conquest had been achieved by the concord of the East and West; but their recent amity was soon imbittered by the mutual complaints of jealousy and pride. The Greeks assumed as their own the merit of the conquest and the pomp of the triumph; extolled the greatness of their powers, and affected to deride the intemperance and sloth of the handful of Barbarians who appeared under the banners of the Carlovingian prince. His reply is expressed with the eloquence of indignation and truth: "We confess the magnitude of your preparation," says the great-grandson of Charlemagne. "Your armies were indeed as numerous as a cloud of summer locusts, who darken the day, flap their wings, and, after a short flight, tumble weary and breathless to the ground. Like them, ye sunk after a feeble effort; ye were vanquished by your own cowardice; and withdrew from the scene of action to injure and despoil our Christian subjects of the Sclavonian coast. We were few in number, and why were we few? Because, after a tedious expectation of your arrival, I had dismissed my host, and retained only a chosen band of warriors to continue the blockade of the city. If they indulged their hospitable feasts in the face of danger and death, did these feasts abate the vigor of their enterprise? Is it by your fasting that the walls of Bari have been overturned? Did not these valiant Franks, diminished as they were by languor and fatigue, intercept and vanish the three most powerful emirs of the Saracens? and did not their defeat precipitate the fall of the city? Bari is now fallen; Tarentum trembles; Calabria will be delivered; and, if we command the sea, the Island of Sicily may be rescued from the hands of the infidels. My brother," accelerate (a name most offensive to the vanity of the Greek,) "accelerate your naval succors, respect your allies, and distrust your flatterers."