“Oh, boy!” laughed Terry. “If you could ever have seen the kindly, anxious looks in your eyes as you bent over me to help restore my fleeting memory! My friends, I thank you! If ever I do lose my identity I shall request that I be taken to the Mercers, who will surely restore me!”

“Oh, shut up!” said Don, beginning to smile. “We admit that we were completely sold that time. Where in the world did the professor find you?”

“I didn’t find him,” put in the teacher. “Luckily, he found me.” And he related the events of the evening to them.

“You aren’t hurt, I hope, professor?” asked Jim, anxiously.

“No, just bruised a bit. I would have been severely wet if it had not been for Terry’s timely intervention. It was while on the way over here in Terry’s—er—remarkable car that he proposed the trick that was played on you.”

“I’m surprised you would go in for such a thing, professor,” said Don. “But you can be excused because you don’t know Terry. But in the future never do anything that he suggests. If you don’t get in trouble you will be sure to lose all respect for yourself, so I advise against it.”

“Oh, I don’t know,” smiled the older man. “I enjoyed that little scene in which Terry lost his mind!”

“The part we enjoyed,” returned Don, grimly, “was the thumping part.”

“You say your letter was taken from you, professor?” asked Jim.

“Yes, and I wanted that more than anything else. However, it won’t do anyone else any good, so I suppose it is not such a loss, after all.”