Ivan III., continually occupied in extending, consolidating and developing the resources of his vast empire, could not but look with jealousy upon the encroachments of the Turks, who had already overrun all Greece, who had taken a large part of Hungary, and who were surging up the Danube in wave after wave of terrible invasion. Still, sound judgment taught him that the hour had not yet come for him to interpose; that it was his present policy to devote all his energies to the increase of Russian wealth and power. It was a matter of the first importance that Russia should enjoy the privileges of commerce with those cities of Greece now occupied by the Turks, to which Russia had access through the Dnieper and the Don, and partially through the vast floods of the Volga. But the Russian merchants were incessantly annoyed by the oppression of the lawless Turks. The following letter from Ivan III. to the Sultan Bajazet II., gives one a very clear idea of the relations existing between the two countries at that time. It is dated Moscow, August 31st, 1492. "To Bajazet, Sultan, King of the princes of Turkey, Sovereign of the earth and of the sea, we, Ivan III., by the grace of God, only true and hereditary monarch of all the Russias, and of many other countries of the North and of the East; behold! that which we deem it our duty to write to your majesty. We have never sent embassadors to each other with friendly greetings. Nevertheless, the Russian merchants have traversed your estates in the exercise of a traffic advantageous to both of our empires. Often they complain to me of the vexations they encounter from your magistrates, but I have kept silence. The last summer, the pacha of Azof forced them to dig a ditch, and to carry stones for the construction of the edifices of the city; more than this, they have compelled our merchants of Azof and of Caffa to dispose of their merchandise for one half their value. If any one of the merchants happens to fall sick, the magistrates place seals upon the goods of all, and, if he dies, the State seizes all these goods, and restores but half if he recover. No regard is paid to the clauses of a will, the Turkish magistrates recognizing no heirs but themselves to the property of the Russians. "Such glaring injustice has compelled me to forbid my merchants to engage in traffic in your country. From whence come these acts of violence? Formerly these merchants paid only the legal tax, and they were permitted to trade without annoyance. Are you aware of this, or not? One word more. Mahomet II., your father, was a prince of grandeur and renown. He wished, it is reported, to send to us embassadors, proposing friendly relations. Providence frustrated the execution of this project. But why should we not now see the accomplishment of this plan? We await your response."