The result was the Treaty of Zboriv which granted on paper practically all of the Kozak demands. It conferred upon them complete control of the three provinces of Kiev, Braslav, and Chernihiv, placed the Orthodox Metropolitan in the Polish Senate and made the number of registered Kozaks 40,000. This was considerably less than Khmelnitsky had demanded the winter before and it aroused annoyance in both the Ukrainian and Polish camps. The Catholic prelates in the Senate declined to admit the Orthodox Metropolitan to their number and he obligingly returned from Warsaw to Kiev. It displeased most of the magnates, even those more moderate than Wisniowiecki, because it recognized the Kozak leaders as their equals. On the other hand it promised little for the bulk of the Ukrainian population, who had joined Khmelnitsky’s army, since in many sections it compelled them to return, even with an amnesty, to the harsh rule of their former lords. Many of the more independent went across the border of Moscow to the so-called Slobidshchina or Free Land which was still practically a lordless domain. Their departure of course weakened the Host and deprived it of many men who had done it good service. Yet the years after the Treaty of Zboriv marked the height of the influence of Bohdan. It was the time when he could have carried through far reaching reforms and strengthened the country internally. However he spent his energies in trying to marry his son Timosh to the daughter of Vasyl Lupul, the ruler of Moldavia, and in carrying on negotiations with the Sultan of Turkey and the Khan of the Crimea. As a result he gave the Poles the opportunity of recovering their strength and, under the driving force of Wisniowiecki, the work went forward rapidly, with the result that the Kozaks were badly defeated at the battle of Berestechko in the summer of 1651, again due to the treachery and fear of their Tatar allies. The Treaty of Bila Tserkva of that autumn reduced the Kozak power but it still left Bohdan strong. It increased discontent against him among the Ukrainians and drove him to still more far reaching diplomatic schemes. His mood was made worse by the discovery that his beloved Helen was intriguing against him and when proof was forthcoming, he had her and her friend executed. The final certainty that Helen had played him false wrecked his general shrewdness and embittered him in every way.