secured her own interests. The Elector, to make his place certain in the final treaty, took active part against Sweden. Peace was concluded in 1657 and ratified in 1660 at Oliva, With the expulsion of the Swedes the historical part of “The Deluge” is ended, no further reference being made to the main war between the Commonwealth and Moscow.

Since the Turkish invasion described in “Pan Michael” was caused by events in this main war, a short account of its subsequent course and its connection with Turkey is in order in this place.

Bogdan Hmelnitski dreaded the truce between Moscow and Poland. He feared lest the Poles, outwitting the Tsar, might recover control of the Cossacks; hence he joined the alliance which Karl Gustav had made with Rakotsy in 1657 to dismember the Commonwealth. Rakotsy was defeated, and the alliance failed; both Moscow and Austria were opposed to it.

In 1657 Hmelnitski died, and was succeeded as hetman by Vygovski, chancellor of the Cossack army, though Yuri, the old hetman’s son, had been chosen during his father’s last illness. Vygovski was a noble, with leanings toward Poland, though his career was firm proof that he loved himself better than any cause.

In the following year the new hetman made a treaty at Gadyach with the Commonwealth, and in conjunction with a Polish army defeated Prince Trubetskoi in a battle at Konotop. The Polish Diet annulled now the terms of the treaty concluded with Moscow two years before. Various reasons were alleged for this action; the true reason was that in 1655 the succession to the Polish crown had been offered to Austria, and, though refused in public audience, had been accepted in private by the Emperor for his son Leopold. In the following year Austria advised the Poles unofficially to offer this crown (already disposed of) to the Tsar, and thus induce him to give the Commonwealth a respite, and turn his arms against Sweden.

The Poles followed this advice; the Tsar accepted their offer. When the service required had been rendered the treaty was broken. In the same year, however, Vygovski was deposed by the Cossacks, the treaty of Gadyach rejected, and Yuri Hmelnitski made hetman. The Cossacks were again in agreement with Moscow; but the Poles spared no effort to bring Yuri to their side, and they succeeded through the deposed hetman, Vygovski, who adhered to the Commonwealth so far.

Both sides were preparing their heaviest blows at this juncture, and 1660 brought victory to the Poles. In the beginning 

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