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Rh settle the matter. He was not disappointed, for the remonstrances of Hoffmann, who was anxious to see Tycho and Kepler co-operate in the service of science, succeeded in softening Kepler, to which Jessenius, as a friend of both parties, also contributed. About three weeks after his departure from Benatky, Kepler therefore wrote a repentant letter to Tycho, in which he acknowledged that he had met with nothing but kindness from Tycho, and begged to be forgiven for his conduct, which was the result of a youthful and choleric temper and his shaken health. The two astronomers met at Prague, were reconciled, and went back to Benatky together, where Kepler now stayed four weeks, until at the beginning of June he left Bohemia for a while to settle his affairs at Gratz. At parting, Tycho gave him a most flattering testimonial, in which he spoke in the highest terms of the manner in which Kepler had devoted himself to scientific work at Benatky.

Kepler had hoped to be able to retain his appointment at Gratz and get leave for a year or two to work with Tycho. To settle permanently with him he was not inclined, but he soon had very little choice in the matter. Early in August an Ecclesiastical Commission arrived at Gratz, and every official had to appear before it and to state whether he would become a Roman Catholic or not. Those who refused were ordered to dispose of their goods and to leave the Austrian provinces within forty-five days. Among these was Kepler, who again applied to Mästlin and Herwart for advice. But at Tübingen there was no opening, and Herwart strongly advised him to go to Prague. There seemed to be no help for it now, and no matter what doubts Kepler might have as to the feasibility of living in the same house with Tycho and his family, or of preparing planetary tables in concert with a man from whom he differed on the most