The Imperial Diet in Augsburg, which had opened on February 5, 1555, and the Augsburg Settlement signed on September 25 receive surprisingly little attention in Melanchthon's correspondence. In addition to his university duties in Wittenberg, Melanchthon was much more intensively occupied with the inner-Protestant disputes. In September 1555, he traveled to Nuremberg together with Joachim Camerarius and others to settle the Osiandrian controversy there. Melanchthon's judgment was also in demand in Augsburg and Pomerania, and conflicts broke out elsewhere too. The appearance of a comet, which Melanchthon was able to observe from March 5 to April 16, 1556, seemed to herald new religious disputes and wars. Melanchthon collected news about the healing spring discovered in Bad Pyrmont in February 1556 with great interest and even recommended it to his sick friend Johannes Mathesius.