“Ah! I had forgotten,” answered the old man. “Your first term of service will be three months. After that, you may expect an advance. Will two hundred dollars a month be satisfactory? Remember, you have no living expenses here.”

“Two hundred a month will be quite satisfactory,” replied Harry.

“Very good,” said the professor, with his peculiar smile. “I want you to be satisfied. So your salary will be two hundred and fifty, instead of two hundred.”

Professor Whitburn was busy with his papers. He had become totally oblivious to Harry’s presence; Crawford tapped Harry on the shoulder, and pointed significantly toward the door, showing that the interview was ended.

Rising, he followed the other two men from the room. As he left, Harry glanced back. The old professor was still engrossed in his work.

CHAPTER XVII

A VISIT TO PRINCE ZUVOR

LAMONT CRANSTON strolled into the Cobalt Club, and took his place in a comfortable chair. He looked about him, as though expecting to see some one. Then he languidly tapped a cigarette on a gold case, and leaned back in his chair.

A week had passed since Lamont Cranston’s chat with Prince Zuvor — the Russian who called himself Richard Albion. During that week, Cranston had been at the Cobalt Club infrequently; and then only for short stays. On his last visit, he had left a brief note for Richard Albion.

“Telephone, sir,” said an attendant, who approached the chair where Lamont Cranston was seated.