James Stone looked as if the ground had suddenly caved from under his feet. His big body stiffened, his hands clutched his hat, and his startled eyes were riveted on Follansbee’s countenance. He moistened his dry lips again and attempted to speak, but it ended only in a swallow, as evidenced by the movement in his throat.  
The great specialist seemed to enjoy the sensation he had made.
 
“You know, Mr. Stone,” he went on, “that we doctors have a way, sometimes, of locating a patient’s trouble by feeling him over until we find a tender spot. When he winces, we know we’ve struck it, and we draw our own conclusions. It’s obvious that I’ve found your tender spot; therefore, there isn’t any use in your beating about the bush. I know that you desire to eliminate Crawford. I might use a stronger expression, but I’ll spare your feelings to that extent. Out with it, now, man! You have a lot of poison bottled up in your system. Let it come out. If there’s anything wrong with you mentally, as your friend in Brazil seems to have thought, I’ll find it out and make due allowances. On the other hand, if you’re sane, you need be no more afraid of confiding in me. I’m not a policeman, you know—or a judge. Remember, too, that I have said I could help you.”
 
It was not so much his words, but the manner in which he uttered them that gave James Stone a certain confidence.
 
Follansbee was as far removed as possible from the type of the kindly, tolerant, helpful physician. On the contrary, everything said, every glance he cast—the whole man, in fact—would have been highly distasteful to the average person. It was that very thing, however, that tended to draw Stone out and to make him reveal the murderous impulses which controlled him.
 
It seemed incredible, but he had a feeling that he had nothing to fear from the famous Doctor Follansbee; in fact, that the latter was a possible ally. And in support of that startling belief, certain words of young Floyd’s came to him.
 
Floyd had said that Follansbee was very eccentric, had ways of doing things that were all his own, and was in the habit of seeming to sympathize with those who came to him, no matter what they might say or do.
 
The young physician had evidently been a firm believer in the man who had once been his professor, but Stone found himself wondering if Follansbee was what he had seemed to Floyd. He doubted it, and decided he had found a kindred spirit. Follansbee’s mask seemed to be slipping off.
 
Emboldened by this, the miner dropped his great hands on his knees and leaned forward, flinging a quick glance about him as he did so.
 
“Are you sure we’ll not be heard here?” he asked, cunning returning to his eyes.
 
“Perfectly,” was the answer. “My servants are well trained, and these walls are much thicker than those they put into the houses they build nowadays. You can talk openly and freely, Stone, and your secrets will be guarded.”
 
Stone nodded, and the glitter in his eyes became more pronounced.
 
“You are right, Doctor Follansbee,” he said. “I can’t figure out how you know, but I want to get rid of Win Crawford. I—I want to get rid of him before he gets rid of me.”
 
His heavy face was wrinkled into a mask of cunning—the foolish, vacant cunning of the insane.
 
“He thinks he’s clever,” Stone went on; “thinks I don’t know what he’s going to do. But I’m as cute as he is, and I’ve tumbled to him.”
 
Follansbee had folded his long, flexible fingers and was leaning his shoulders on the arms of his chair. His evil-looking eyes were slowly taking on a mocking twinkle as they looked at the features of the man in front of him.
 
The skilled specialist had no further doubt about the matter. At that moment he knew to a certainty that James Stone was mad, and that his was the most dangerous form of insanity, for it centered only on one object.
 
Outwardly and in his everyday life, Stone might move and conduct himself as an ordinary individual, but lurking always in his diseased brain was one wild and terrible fancy—an insane fear and hatred of the man who in the brighter, if less prosperous, past he had once risked............