There stood the doctor, entirely unmoved. He looked directly at Nick but seemed not to see him.

His eyes were fixed, and their expression was peculiar. One less experienced than Nick would have supposed Dr. Jarvis to be insane.

Certainly his conduct as well as his appearance seemed to justify such a

But Nick knew better. He recognized at once the peculiar condition in which Dr. Jarvis then was. He had seen the phenomenon before.

"Walking in his sleep," Nick said to himself. "Shall I wake him here? I think not. Let me see what he will do."

[!-- CH23 --]

CHAPTER III.

THE DOCTOR OFFERS A BRIBE.

Nick was not greatly surprised by his discovery. He knew that Dr. Jarvis was a sleep-walker.

The reader may remember the case of a young woman who, in her sleep, walked nearly a mile on Broadway, and was awakened by a policeman to whom she could give no account of her wanderings.