“Oh, I know that,” he said.

“Will you make an exchange, then?”

“No. Besides, it would be all the same for me if I did,” he contrived to whisper just as the professor called us up to the blackboard. “I don’t feel up to anything to-day.”

“Then everything is lost!” I thought to myself. Instead of the brilliant result which I had anticipated I should be for ever covered with shame — more so even than Ikonin! Suddenly, under the very eyes of the professor, Ikonin turned to me, snatched my ticket out of my hands, and handed me his own. I looked at his ticket. It was Newton’s Binomial!

The professor was a youngish man, with a pleasant, clever expression of face —