After the conquest of Kasan, several Russians settled in that province; among others, a merchant of the name of Strogonoff, who established some salt-works on the banks of the Kama, and opened a trade with the natives. Among these he noticed some strangers, and having heard that they came from a country ruled by a Tartar Khan, who resided in a capital called Sibir, he sent some of his people into their land. These agents returned with the finest sable skins, which they had purchased for a trifling sum; and Strogonoff, not so covetous as to wish to keep all the advantage of his discovery to himself, immediately informed the Government of the new trade he had opened. He was rewarded with the gift of considerable estates at the confluence of the Kama and Tschinsova, and his descendants, the Counts Strogonoff, are, as is well known, reckoned among the richest of the Russian nobility. Soon after Ivan sent some troops to Siberia, whose prince, Jediger, acknowledged his supremacy, and promised to pay him an annual tribute of a thousand sable skins. But this connection was not of long duration, for a few years after Jediger was defeated by another Tartar prince, named Kutchum Khan; and thus, after Russian influence had taken the first step to establish itself beyond the Ural, it once more became doubtful whether Northern Asia was to be Christian or Mohammedan. The question was soon after decided by a fugitive robber. The conquests of Ivan on the Caspian Sea had called into life a considerable trade with Bokhara and Persia, which, however, was greatly disturbed by the depredations of the Don Cossacks, who made it their practice to plunder the caravans. But Ivan, not the man to be trifled with by a horde of freebooters, immediately sent out a body of troops against the Don Cossacks, who, not venturing to meet them, sought their safety in flight. At the head of the fugitives, whose number amounted to no less than 6000 men, was Yermak Timodajeff, a man who, like Cortez or Pizarro, was destined to lay a new empire at the feet of his master. But while the troops of the Czar were following his track, Yermak was not yet dreaming of future conquests; his only aim was to escape the executioner; and he considered himself extremely fortunate when, leaving his pursuers far behind, he at length arrived on the estates of Strogonoff. Here he was well received--better, no doubt, than if he had come single-handed and defenseless; and Strogonoff having made him acquainted with Siberian affairs, he at once resolved to try his fortunes on this new scene of action. As the tyranny of Kutchum Khan had rendered him odious to his subjects, he hoped it would be an easy task to overthrow his power; the prospect of a rich booty of sable skins was also extremely attractive; and, finally, there could be no doubt that the greatest dangers were in his rear, and that any choice was better than to fall into the hands of Ivan the Terrible.