viewed the destruction of his suburb, expressed his resentment, not by arms, but by ambassadors. This misfortune, however, was advantageous to the Genoese, who obtained, and imperceptibly abused, the dangerous license of surrounding Galata with a strong wall; of introducing into the ditch the waters of the sea; of erecting lofty turrets; and of mounting a train of military engines on the rampart. The narrow bounds in which they had been circumscribed were insufficient for the growing colony; each day they acquired some addition of landed property; and the adjacent hills were covered with their villas and castles, which they joined and protected by new fortifications. [44] The navigation and trade of the Euxine was the patrimony of the Greek emperors, who commanded the narrow entrance, the gates, as it were, of that inland sea. In the reign of Michael PalÊologus, their prerogative was acknowledged by the sultan of Egypt, who solicited and obtained the liberty of sending an annual ship for the purchase of slaves in Circassia and the Lesser Tartary: a liberty pregnant with mischief to the Christian cause; since these youths were transformed by education and discipline into the formidable Mamalukes. [45] From the colony of Pera, the Genoese engaged with superior advantage in the lucrative trade of the Black Sea; and their industry supplied the Greeks with fish and corn; two articles of food almost equally important to a superstitious people. The spontaneous bounty of nature appears to have bestowed the harvests of Ukraine, the produce of a rude and savage husbandry; and the endless exportation of salt fish and caviare is annually renewed by the enormous sturgeons that are caught at the mouth of the Don or Tanais, in their last station of the rich mud and shallow water of the MÊotis. [46] The waters of the Oxus, the Caspian, the Volga, and the Don, opened a rare and laborious passage for the gems and spices of India; and after three months' march the caravans of Carizme met the Italian vessels in the harbors of CrimÊa. [47] These various branches of trade were monopolized by the diligence and power of the Genoese. Their rivals of Venice and Pisa were forcibly expelled; the natives were awed by the castles and cities, which arose on the foundations of their humble factories; and their principal establishment of Caffa [48] was besieged without effect by the Tartar powers. Destitute of a navy, the Greeks were oppressed by these haughty merchants, who fed, or famished, Constantinople, according to their interest. They proceeded to usurp the customs, the fishery, and even the toll, of the Bosphorus; and while they derived from these objects a revenue of two hundred thousand pieces of gold, a remnant of thirty thousand was reluctantly allowed to the emperor. [49] The colony of Pera or Galata acted, in peace and war, as an independent state; and, as it will happen in distant settlements, the Genoese podesta too often