"What is the matter?" asked Burnham. "Is it——"

"I don't know. All I know is that they told me to get Mr. Merriwell in a hurry."

"Goodness!" muttered the manager. "I hope this don't mean that——"

He did not finish, and Frank followed the boy, wondering why he had been summoned by Zolverein.

The messenger was a bell boy from the hotel, and he piloted Frank up to the door of the magician's room.

Frank knocked lightly.

The door was opened at once by a tall man who wore a Vandyke beard. It was Dr. Gray.

"This is Mr. Merriwell," explained the bell boy.

"Come in," said the doctor, softly. "You are in time."

"In time!" echoed Merry, wonderingly. "In time for what?"