Half an hour later they stood in the room where Bardetto lived. This too was in a tenement and poorly furnished. It seemed to be a combination of bed room, living room, dining room, and kitchen. The Thinking Machine began a minute search of the room. Bureau drawers were pulled out, the bed denuded, articles of furniture moved, and even the oil stove turned upside down. Hatch stood looking on without the slightest idea of the object of the search.
"What are you looking for?" he asked at last.
"I don't know," The Thinking Machine confessed frankly. "The ultimate purpose is to find out why the monkey was killed. I have an idea that there is something here that will answer the question."
And the search continued. Every conceivable point seemed to have been gone over; and Hatch was marveling at the thoroughness of it, when The Thinking Machine dropped on his knees on the floor and wriggled along, minutely inspecting the baseboard at every joint. One of these sounded unlike the others when he rapped it, and he began work at it. Finally the board responded to the prying of a knife and fell out. The Thinking Machine took one look.
"Dear me! Dear me!" he exclaimed in a tone which nearly indicated astonishment.
He plunged both hands into the narrow aperture and tumbled out on the floor package after package of money-crackling, rustling bills-unfolded and with the sheen of newness still on them. There was money and money! Hatch stared with bulging eyes.
"Now I know why the monkey was killed," remarked The Thinking Machine conclusively. "This is what I was looking for, but I didn't know it."
"Great Scott! Whose is it? How much is there? Where did it come from?"
Hatch flung the questions at the diminutive scientist still crouching on the floor. The Thinking Machine glanced at him in petulant reproof at an excitement which the reporter's voice betrayed.
"Whose is it?" he repeated. "Bardetto's. How much is there? I should say from fifty to seventy-five thousand dollars. It's all in two and five dollar bills. Where did it come from? I should say that it came from the--"
The door behind them squeaked a little as it swung on its hinges. Hatch turned quickly. It was the girl. For an instant they stood motionless, staring at each other in mutual astonishment. The Thinking Machine didn't even glance around.
"Put that woman under arrest, Mr. Hatch," he commanded irritably, "and close the door! She has no revolver, but look out for a knife."
Hatch pushed the door to with his foot. "Now, signorina," he remarked grimly, "I shall have to ask you to remain silent."
The girl was evidently not one of the screaming kind, but her right hand disappeared into the folds of her dress as she faced him boldly. It was a sinister movement. Hatch smiled a little, and his own right hand went back to his hip. Perhaps he smiled because he had never been guilty of carrying a revolver in all his life.
"Don't do that, signorina!" he advised pleasantly. "Don't make any mistake with that knife! I have never drawn a revolver on a woman, and I don't want to now; but believe me, you must take out the knife and drop it. You must, I say!" and his right hand moved forward the fraction of a foot threateningly.
Staring straight into his eyes without a tremor in her own, the girl produced the stiletto, and it clattered on the floor. Hatch kicked it beyond her reach. The Thinking Machine finally arose from his place on the floor.
"Mr. Hatch," he commanded sharply, "take the young woman over in the far corner there and let her sit down. Just so surely as she makes any noise, however slight, it will cost one of us, perhaps even both of us, our lives. Remember that and act accordingly. Don't hesitate an instant because she happens to be a woman. I shall be able alone to take care of whoever else may happen to enter."
The tone was one which was utterly strange to the reporter, coming as it did from this crabbed, irritable little scientist whom he had known so long. It was chilling by reason of its very gravity, and for the first time in his life Hatch felt that his companion considered a situation imminently dangerous. All of which convinced him that if he had ever obeyed orders now was the time. The girl's face was white, but there was a slight, mocking smile wavering about her lips.
The Thinking Machine turned the gas half down, then went over and sat near the door. Silently they waited, five, ten, fifteen minutes; then they heard a quick, muffled tread moving along the hall toward the door.
"If she moves or makes the slightest sound, shoot!" directed The Thinking Machine in a low voice.
He arose and faced the door. Some one fumbled at the lock, and the door swung inward. The figure of a man appeared.
"Hands up!" commanded The Thinking Machine abruptly, and he thrust a glittering something beneath the intruder's nose. The man's hand went up. The Thinking Machine leaned forward suddenly and deftly abstracted a revolver from the stranger's right hand pocket. He gave a sight of infinite relief as he straightened up, holding the captured revolver in hand.
"It's all right, Mr. Hatch," he said to the reporter, who had scarce dared remove his eyes from his prisoner. Then to the man and woman, "It may interest you to know that neither of us had a weapon of either sort until I got this revolver. I stopped you," he told the man, "with a clinical thermometer, and Mr. Hatch captured you," he told the woman, "at the point, we may say, of his pipe case."
They were all at police headquarters-The Thinking Machine, Hatch, and the two prisoners. Piled up on Detective Mallory's desk were the packages of bills which the scientist had discovered. They were counterfeit, all of two and five dollar denominations, and excellent in texture, engraving, and printing. But the numbers were at fault; all the twos were the same, and all the fives were the same.
For the enlightenment of Detective Mallory, The Thinking Machine and Hatch repeated in detail those incidents leading up to the capture of the man and the woman.
"There is really little to explain," said the scientist at the end; "although the problem, while it lasted, was one of the most complex and intricate I have ever met. We may dismiss Mr. Hatch's first adventure as of no consequence. It just happened that he went to the house on a different matter, and fortunately was dragged into this affair. Now, I have no doubt that the prisoners here will give us the location of the counterfeiter's plant?"
He glanced at the man and woman. They looked at each other, but remained silent.
"I have never met a counterfeiter yet who would give up the hiding place of his plates," remarked Detective Mallory.
"But these are not counterfeiters, Mr. Mallory," said The Thinking Machine; "they are merely thieves. Bardetto, the man who was found unconscious, who owned the monkey, is one of the counterfeiters. Let me explain briefly how every fact considered clears up the problem. First, the inevitable logic of the affair shows us that these two prisoners learned in some manner unknown that Bardetto was either a principal or an agent for some big counterfeiting scheme; for we can't believe that they thought this was real money. But instead of reporting the matter to the police they resolved to benefit by it themselves. How? By stealing the bills from Bardetto, this to be followed, perhaps, by immediate flight to Italy. They are both Italians, and you may know that a clever American counterfeit abroad is almost as good as the genuine; and for that matter these bills would pass in circulation readily here.
"Granting, then, that they did know of Bardetto's part in the scheme, we can readily imagine that they learned that Bardetto had a quantity of the money in his possession; so the robbery was planned. The man here did the work, and was to meet the woman in the vacant rooms of the tenement where Mr. Hatch saw her.
"Well, Bardetto was attacked and his pockets rifled. Evidently our prisoner did not find what he sought, and yet he knew that the money had passed into Bardetto's possession, and perhaps too that he had had no opportunity of getting rid of it. Was it in the organ? He smashed it to see. It wasn't. Then, the monkey: was the money concealed about the animal's clothing? That was the next question in the robber's mind.
"Half a dozen reasons, such as some one approaching, would have prevented this man making a search there; so he broke the monkey's chain and took the little brute along with him. In the vacant apartments the man did not meet the woman-we know why-perhaps presumed that she did not come, and so went on with his search. It is extremely probable that the monkey struggled and fought in the hands of a stranger, so the man stabbed it. He had no use for it, anyway. Now, as a matter of fact," and the scientist turned to the man whom he had personally taken prisoner, "you took a pouch or pocket from beneath the monkey's clothing, didn't you?"
The prisoner stared at him an instant, then nodded.
"So he got that counterfeit money which he knew had been in Bardetto's possession," continued The Thinking Machine. "It was not a great deal-not so much as he had anticipated, we'll say-then he and the woman planned to search Bardetto's room for more, knowing he was in the hospital. Perhaps the woman went ahead to reconnoiter. I didn't see her enter, but knew it was a woman because her skirts swished, and told Mr. Hatch to lose no time in arresting her.
"The minute I found the money I knew the solution of the affair-the solution that must be correct. Up to that time I had imagined a dozen other things-jewels, letters, papers of some sort. That is why I told Mr. Hatch I didn't know what I was searching for." There was a pause. "I think, perhaps, that explanation covers it all."
"I still don't see why Hatch should have been held up," remarked Detective Mallory.
"It might have been merely excess of caution," was the reply, "or the woman might have admitted him first under a misapprehension as to his identity, and was afraid to let him go. It was almost dark in the hall."
"But why should Bardetto entrust the money to the monkey?" Hatch inquired curiously. "It seems to me that it would have been safer for him to carry it himself."
"On the contrary," was the reply. "A man in his position is always expecting arrest. If the money had been found on him, it would have convicted him; if it had been found in his organ, and that should have fallen into other hands and been identified, it would have convicted him. But if the money was on the monkey, which couldn't talk, and he felt himself in danger, it would have been easy to free it, and perhaps it could easily have succeeded in making its escape."
The two prisoners willingly informed Detective Mallory of the whereabouts of the counterfeiter's plant-were apparently even anxious to inform him-and he in person led the raid on it. Plates for the bills were seized, and five expert workers placed under arrest.
From the time Hutchinson Hatch was held up in the vacant room until seven prisoners were in their cells at police headquarters less than twelve hours had elapsed.
_________________________.
PROBLEM OF THE PERFECT ALIBI.
Skulking along through the dense gloom, impalpably a part of the murky mist which pressed down between the tall board fences on each side, moved the figure of a man. Occasionally he shot a glance behind him, but the general direction of his gaze was to his left, where a fence cut off the small back-yards of an imposing row of brown-stone residences. At last he stopped and tried a gate. It opened noiselessly and he disappeared inside. A pause. A man came out of the gate, closed it carefully and walked on through the alley toward an arc-light which spread a generous glare at the intersection of a street.
Patrolman Gillis was standing idly on a corner, within the light-radius of a street lamp debating some purely personal questions when he heard the steady clack, clack, clack of foot-steps a block or more away. He glanced up and dimly he saw a man approaching. As he came nearer the policeman noticed that the man's right hand was pressed to his face.
"Good evening, officer," said the stranger nervously. "Can you tell me where I can find a dentist?"
"Toothache?" inquired the policeman.
"Yes, and it's nearly killing me," was the reply. "If I don't get it pulled I'll-I'll go crazy."
The policeman grinned sympathetically.