Those who escaped death fled to the fortified Podolian town of Tulchyn. Here an even more terrible tragedy was enacted. A large horde of Cossacks and peasants laid siege to the fortress, which contained several hundred Poles and some fifteen hundred Jews. The Poles and Jews took an oath not to betray one another and to defend the city to their last breath. The Jews, stationed on the walls of the fortress, shot at the besiegers, keeping them off from the city. After a long and unsuccessful siege the Cossacks conceived a treacherous plan. They informed the Poles of Tulchyn that they were aiming solely at the Jews, and, as soon as the latter were delivered into their hands, they would leave the Poles in peace. The Polish pans, headed by Count Chetvertinski, forgot their oath, and decided to sacrifice their Jewish allies to secure their own safety. When the Jews discovered this treacherous intention, they immediately resolved to dispose of the Poles, whom they excelled in numbers. But the Rosh-Yeshibah of Tulchyn, Rabbi Aaron, implored them not to touch the pans, on the ground that such action might draw upon the Jews all over the Empire the hatred of the Polish population. "Let us rather perish," he exclaimed, "as did our brethren in Niemirov, and let us not endanger the lives of our brethren in all the places of their dispersion." The Jews yielded. They turned over all their property to Chetvertinski, asking him to offer it to the Cossacks as a ransom for their lives. After entering the city, the Cossacks first took possession of the property of the Jews, and then drove them together into a garden, where they put up a banner and declared, "Let those who are willing to accept baptism station themselves under this banner, and we will spare their lives." The rabbis exhorted the people to accept martyrdom for the sake of their religion and their people. Not a single Jew was willing to become a traitor, and fifteen hundred victims were murdered in a most barbarous fashion. Nor did the perfidious Poles escape their fate. Another detachment of Cossacks, which entered Tulchyn later, slew all the Catholics, among them Count Chetvertinski. Treachery avenged treachery.