The buzzing of the fly was produced by Merriwell himself, who imitated the proper sound.

Frank located Sport Harris, and recognized the fellow. Then, standing near the mirror, he whispered to Mazarin the name he wished him to spell with the aid of the magnetized fly.

Thus it will be seen that this apparently marvelous performance was in truth a "fake," and not at all difficult to give. But it was always successful when properly done.

Merry took care of the apparatus, and then looked over the other stuff, locking up such things as he did not wish to leave out to be inspected by curious eyes.

When this was done, he went to the box office, where he found Burnham waiting for him.

"What's the matter with Mazarin?" asked the manager of the opera house.

"Why?"

"He has been here growling like a dog with a sore ear."

"He thinks Zolverein did not use him right in giving the apparatus to me."

"I thought it must be something of the kind. The fellow is cranky. You had better look out for him."