Now although all these learned men were filing out of the lecture-room under the impression that they had seen nothing of note, as a matter of fact one of the most wonderful things in the whole history of the world had just occurred before their very eyes Professor von Baumgarten had been so far correct in his theory that both his spirit and that of his pupil had been for a time absent from his body. But here a strange and unforeseen complication had occurred. In their return the spirit of Fritz von Hartmann had entered into the body of Alexis von Baumgarten, and that of Alexis von Baumgarten had taken up its abode in the frame of Fritz von Hartmann. Hence the slang and scurrility which issued from the lips of the serious Professor, and hence also the weighty words and grave statements which fell from the careless student. It was an unprecedented event, yet no one knew of it, least of all those whom it concerned. The body of the Professor, feeling conscious suddenly of a great dryness about the back of the throat, sallied out into the street, still chuckling to himself over the result of the experiment, for the soul of Fritz within was reckless at the thought of the bride whom he had won so easily. His first impulse was to go up to the house and see her, but on second thoughts he came to the conclusion that it would be best to stay away until Madame Baumgarten should be informed by her husband of the agreement which had been made. He therefore made his way down to the Grüner Mann, which was one of the favourite trysting-places of the wilder students, and ran, boisterously waving his cane in the air, into the little parlour, where sat Spiegler and Müller and half a dozen other boon companions. “Ha, ha! my boys,” he shouted. “I knew I should find you here. Drink up, every one of you, and call for what you like, for I’m going to stand treat to-day.” Had the green man who is depicted upon the signpost of that well-known inn suddenly marched into the room and called for a bottle of wine, the students could not have been more amazed than they were by this unexpected entry of their revered professor. They were so astonished that for a minute or two they glared at him in utter bewilderment without being able to make any reply to his hearty invitation. “Donner und Blitzen!” shouted the Professor angrily. “What the deuce is the matter with you, then? You sit there like a set of stuck pigs staring at me. What is it, then?” “It is the unexpected honour,” stammered Spiegel, who was in the chair. “Honour--rubbish!” said the Professor testily. “Do you think that just because I happen to have been exhibiting mesmerism to a parcel of old fossils, I am therefore too proud to associate with dear old friends like you? Come out of that chair, Spiegel my boy, for I shall preside now. Beer, or wine, or shnapps, my lads--call for what you like, and put it all down to me.”