[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 Palaeologus, 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 Maeotis.

[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 Crimaea.