Among the acquaintances that he had made through his connection with the Lengefeld family was a little group of people in Erfurt. There were Karoline von Dacheröden and her lover, Wilhelm von Humboldt, who was destined to become Schiller's intimate friend and also his faithful comrade in the field of aesthetic philosophizing. Then there was the influential Baron Karl Theodor von Dalberg, a brother of the Mannheim intendant. This elder Dalberg, who some years later became dubiously prominent in connection with Napoleon's Confederation of the Rhine, was now residing at Erfurt as Coadjutor to the Elector of Mainz and expecting to become Elector himself on the death of his superior. He was an energetic, good-natured man, not free from ostentatious fussiness, and he enjoyed the rôle of Maecenas. In Schiller and Lotte he took a deep interest, promising to do something handsome for them when he should come to power at Mainz. While spending his vacation with these Erfurt friends, at the close of the year 1790, Schiller took a cold which brought on an attack of pneumonia. An Erfurt doctor treated the case lightly and unskillfully and sent him back half cured to Jena, where he resumed his lectures. Now came a second and sharper attack, with hemorrhage and other alarming symptoms. The doctors operated upon him as best they knew, with leeches and phlebotomy and purgatives and vomitives, and came very near killing him. For days he lay at the point of death, a few faithful students sharing the young wife's anxious vigil at his bedside. His convalescence was slow and in the end imperfect, leaving him with wasted strength, a pain in the right lung and a serious difficulty in breathing. Of course it was all up with his lecturing; but he easily obtained a release for the summer term from the sympathetic Duke of Weimar. In March he was well enough to take up the reading of Kant's then recently published 'Critique of the Judgment', and a little later to try his hand at translating from the Aeneid in stanzas and to write a rejoinder to the 'anticritique' of the aggrieved Bürger.