"Well, here's my hand on it, and it is as good as settled. No matter how much I may desire a smoke now, I'll not monkey with the deadly cigarette."

Their hands met again.

CHAPTER XXX.

FRANK AND THE PROFESSOR.

Frank Merriwell was right in thinking he had not seen the last of the man in black. On the third day after his first meeting with the mysterious stranger he was astonished, while ascending the stairs, to see that individual come out of Professor Gunn's room. Frank paused on the flight that led to the "Cock-loft," and watched the man hurriedly descend the stairs.

"Great Scott!" muttered the young cadet. "That is remarkable. I wonder what he was up to in the professor's room? He saw me, but he hustled away in a hurry."

For a moment Frank hesitated, and then he resolved to find out, if possible, what could be the meaning of the stranger's visit. With this object in view, he descended the stairs and approached the professor's door, on which he rapped.

Of late Professor Gunn had been severely troubled with headaches, and, this happening to be one of his bad days, he was stopping in his room, with his head bound up in a cloth saturated with camphor. Frank was obliged to rap a second time, and then the professor's shuffling step was heard, and his cloth-bound head appeared as the door opened.

"What's wanted?" he asked, sharply. "Can't I have any peace and rest? Speak up—what's wanted?"