"What happened to you this afternoon in Winter Street?"
Curtis had retained his composure well up to this point; now he became uneasy again. Quick pallor on his face was succeeded by a flush which crept up to the roots of his hair.
"I've been drinking too much," he said at last. "That and this thing have completely unnerved me. I am afraid I was not myself."
"What did you think you saw?" insisted The Thinking Machine.
"I went into a store for something. I've forgotten what now. I know there was a great crowd of women-they were all about me. There I saw--" He stopped and was silent for a moment. "There I saw," he went on with an effort, "a woman-just a glimpse of her, over the heads of the others in the store-and--"
"And what?" insisted The Thinking Machine.
"At the moment I would have sworn it was Marguerite Melrose," was the reply.
"Of course you know you were mistaken?"
"I know it now," said Curtis. "It was a chance resemblance, but the effect on me was awful. I ran out of there shrieking-it seemed to me. Then I found myself here."
"And you don't know what you said or did from that time until the present?" asked the scientist, curiously.
"No, except in a hazy sort of way."
After awhile Martha, the scientist's aged servant, appeared in the doorway.
"Mr. Mallory and a gentleman, sir."
"Let them come in," said The Thinking Machine. "Mr. Curtis," and he turned to him gravely, "Mr. Reid is here. I sent for him as if at your request to ask him two questions. If he answers those questions, as I believe he will, I can demonstrate that you are not guilty of and have no connection with the murder of Miss Melrose. Let me ask these questions, without any hint or remark from you as to what the answer must be. Are you willing?"
"I am," replied Curtis. His face was white, but his voice was firm.
Detective Mallory, whom Curtis didn't know, and Charles Reid entered the room. Both looked about curiously. Mallory nodded brusquely at Hatch. Reid looked at Curtis and Curtis looked away.
"Mr. Reid," said The Thinking Machine without any preliminary, "Mr. Curtis tells me that the knife used to kill Miss Melrose was your property. Is that so?" he demanded quickly, as Curtis faced about wonderingly.
"No," thundered Reid fiercely.
"Is it Mr. Curtis's knife?" asked The Thinking Machine.
"Yes," flashed Reid. "It's a part of his auto."
Curtis started to speak; The Thinking Machine waved his hand toward him. Detective Mallory caught the gesture and understood that Jack Curtis was his prisoner for murder.
IV.
Curtis was led away and locked up. He raved and bitterly denounced Reid for the information he had given, but he did not deny it. Indeed, after the first burst of fury he said nothing.
Once he was under lock and key the police, led by Detective Mallory, searched his rooms at the Hotel Teutonic and there they found a handkerchief stained with blood. It was slight, still it was a stain. This was immediately placed in the hands of an expert, who pronounced it human blood. Then the case against Curtis seemed complete; it was his knife, he had been in love with Miss Melrose, therefore probably jealous of her, and here was the tell-tale blood-stain.
Meanwhile Reid was permitted to go his way. He seemed crushed by the rapid sequence of events, and read eagerly every line he could find in the public prints concerning both the murder and the elopement of Miss Dow. This latter affair, indeed, seemed to have greater sway over his mind than the murder, or that a lifetime friend was now held as the murderer.
Meanwhile The Thinking Machine had signified to Hatch his desire to visit the scene of the crime and see what might be done there. Late in the afternoon, therefore, they started, taking a train for a village nearest the Monarch Inn.
"It's a most extraordinary ease," The Thinking Machine said, "much more extraordinary than you can imagine."
"In what respect?" asked the reporter.
"In motive, in the actual manner of the girl meeting her death and in a dozen other details which I can't state now because I haven't all the facts."
"You don't doubt but what it was murder?"
"It doesn't necessarily follow," said The Thinking Machine, evasively. "Suppose we were seeking a motive for Miss Melrose's suicide, what would we have? We would have her love affair with this man MacLean whom she refused to marry because she knew he would be disinherited. Suppose she had not seen him for a couple of years-suppose she had made up her mind to give him up-that he had suddenly appeared when she sat alone in the automobile in front of the Monarch Inn-suppose, then, finding all her love reawakened, she had decided to end it all?"
"But Curtis's knife and the blood on his handkerchief?"
"Suppose, having made up her mind to kill herself, she had sought a weapon?" went on The Thinking Machine, as if there had been no interruption. "What is more natural than she should have sought something-the knife, say-in the tool bag or kit, which must have been near her? Suppose she stabbed herself while the men were away from the automobile, or even after they had started on again in the darkness?"
Hatch looked a little crestfallen.
"You believe, then, that she did kill herself?" he asked.
"Certainly not," was the prompt response. "I don't believe Miss Melrose killed herself-but as yet I know nothing to the contrary. As for the blood on Curtis's handkerchief, remember he helped carry the body to Dr. Leonard; it might have come from that-it might have come from a slight spattering of blood."
"But circumstances certainly implicate Curtis."
"I wouldn't convict any man of any crime on any circumstantial evidence," was the response. "It's worthless unless a man is forced to confess."
The reporter was puzzled, bewildered, and his face showed it. There were many things he did not understand, but the principal question in his mind took form:
"Why did you turn Curtis over to the police, then?"
"Because he is the man who owned the knife," was the reply. "I knew he was lying to me from the first about the knife. Men have been executed on less evidence than that."
The train stopped and they proceeded to the office of the medical examiner, where the body of the woman lay. Professor Van Dusen was readily permitted to see the body, even to offer his expert assistance in an autopsy which was then being performed; but the reporter was stopped at the door. After an hour The Thinking Machine came out.
"She was stabbed from the right," he said answer to Hatch's inquiring look, "either by some one sitting at her right, by some one leaning over her right shoulder, or she might have done it herself."
Then they went on to Monarch Inn, five miles way. Here, after a comprehensive squint at the landscape, The Thinking Machine entered and for an hour questioned three waiters there.
Did these waiters see Mr. Reid? Yes. They identified his published picture as a gentleman who had come in and taken a hot Scotch at the bar. Any one with him? No. Speak to anyone in the inn? Yes, a lady.
"What did she look like?" asked The Thinking Machine.
"Couldn't say, sir," the waiter replied. "She came in an automobile and wore a mask, with a veil tied about her head and a long tan automobile coat."
"With the mask on you couldn't see her face?"
"Only her chin, sir."