Then the bell clanged loudly, and the pupils began to stream through the entrances into the building. Hanno could not stop laughing. He was still laughing so hard on the stairs that his classmates looked at him and Kai with wonder and cold hostility, and even with a slight disgust at such frivolity. There was a sudden hush in the classroom, and everybody stood up, as Herr Professor Mantelsack entered. He was the Professor _ordinarius_, for whom it was usual to show respect. He pulled the door to after him, bowed, craned his neck to see if all the class were standing up, hung his hat on its nail, and went quickly to the platform, moving his head rapidly up and down as he went. He took his place and stood for a while looking out the window and, running his forefinger, with a large seal ring on it, around inside his collar. He was a man of medium size, with thin grey hair, a curled Olympian beard, and short-sighted prominent sapphire-blue eyes gleaming behind his spectacles. He was dressed in an open frock-coat of soft grey material, which he habitually settled at the waist with his short-fingered, wrinkled hand. His trousers were, like all the other masters’, even the elegant Dr. Goldener’s, far too short, and showed the legs of a pair of very broad and shiny boots. He turned sharply away from the window and gave vent to a little good-natured sigh, smiling familiarly at several pupils. His mood was obviously good, and a wave of relief ran through the classroom. So much--everything, in fact--depended on whether Dr. Mantelsack was in a good mood! For the whole form was aware that he gave way to the feeling of the moment, whatever that might happen to be, without the slightest restraint. He was most extraordinarily, boundlessly, naïvely unjust, and his favour was as inconstant as that of fortune herself. He had always a few favourites--two or three--whom he called by their given names, and these lived in paradise. They might say almost anything they liked; and after the lesson Dr. Mantelsack would talk with them just like a human being. But a day would come--perhaps after the holidays--when for no apparent reason they were dethroned, cast out, rejected, and others elevated to their place. The mistakes of these favourites would be passed over with neat, careful corrections, so that their work retained a respectable appearance, no matter how bad it was; whereas he would attack the other copy-books with heavy, ruthless pen, and fairly flood them with red ink, so that their appearance was shocking indeed. And as he never troubled to count the mistakes, but distributed bad marks in proportion to the red ink he had expended, his favourites always emerged with great credit from these exercises. He was not even aware of the rank injustice of this conduct. And if anybody had ever had the temerity to call his attention to it, that person would have been for ever deprived of even the chance of becoming a favourite and being called by his first name.