“And it occurs to you that perhaps it is all a mystification; perhaps the performer is trying you—just throwing his hands and fingers wildly about the keyboard in the hope that you will fall into the trap and praise him, and then he will laugh and confess that he only wanted to see if he could hoax you. But when at last the piece does finish and the perspiring and agitated musician rises from the piano evidently anticipating praise, you see that it was all done in earnest.”