Fortunately, the persecutions were checked for a while by fresh attempts of the Tatar element in China to seize the imperial crown. The Jesuits kept out of the strife by pronouncing for neither party. Happily, the Tatar element took a fancy to Schall, while Father Coeffler baptized the Chinese empress, giving her the Christian name of Helen and calling her infant son Constantine. The Tatars finally prevailed, and Schall was made a mandarin and president of the board of mathematics of the empire. He was given access to the emperor at all times, and might have made him a Christian had not the empress induced him to resume the pagan practices from which Schall had weaned him. Nor did the death of the troublesome lady mend matters; on the contrary, her disconsolate husband lapsed into melancholia, and in 1661 died, leaving a child of eight as his successor. In pursuance of the emperor's command, Schall was appointed instructor of the prince, but, as was to be expected, that arrangement aroused the fury of the people and especially of the bonzes. They maintained, rightfully from their point of view, that if Schall were left in position during the long minority of the prince, he would be absolute master of the future emperor--a result that must be prevented by crushing out Christianity. Forthwith all the missionaries were summoned to Pekin and thrown into prison. There was now no longer any discussion about the worship of Confucius, for the disputants were all in the dungeons of Pekin or elsewhere waiting for death. The Christians were without pastors, but Father Gresson, who was in China at that time, tells us in his "History of China under the Tatars" that, during the persecution, the catechists baptized 2000 converts. It is not surprising, for before the outbreak of the persecution, the Jesuits had one hundred and fifty-one churches and thirty-eight residences in China; the Dominicans twenty-one churches and two residences, and the Franciscans one establishment. The total Christian population amounted to 250,000. Up to that time the Fathers of the Society had written one hundred and thirty-one works on religious subjects, one hundred and three on mathematics, and fifty-five on physics.