Then, without apparently looking at Marsh, he suddenly said, "It's a long jump from Mexico to Chicago."

Marsh unclasped his fingers for a moment and looked hard at Morgan.

Morgan caught what he believed to be a start, but gave no indication that it had made an impression upon him.

"I was wondering," he continued, slowly, "what had brought you such a long way."

"Obviously, Mr. Morgan, if you know that much about me, you must also know that I came here on business."

"When do you attend to your business, Mr. Marsh?" asked Morgan, now looking him in the eye.

"At various times of the day," replied Marsh. "Whenever I can get appointments with the people I am negotiating with. I don't quite understand the trend of these questions, but I might say that I was downtown on business the greater part of yesterday afternoon."

"Does standing on a Michigan Avenue curb const.i.tute the princ.i.p.al part of your business, Mr. Marsh?"

"Well, I sometimes fill in my time like that until I am sure the people who are interested in my movements have gone on about their own business."

It was Morgan's turn to look disconcerted. Evidently he had a clever man to deal with, and he began to wonder if his present step had not been too precipitate. He felt sure that it was going to be difficult to fasten anything on this man. He decided, however, that he had gone too far to draw back now, and he went on with his questions.

"In the preliminary report which was given me," he said, "I noticed that you made a statement to the patrolman you called in that the noise in the flat above aroused both you and your wife."

"Yes," admitted Marsh. "I believe I did say something like that."

"But," added Morgan, "we have not been able to get an interview with your wife."

"Such an interview would be quite useless. As a matter of fact, she knows no more, and probably not so much as I do about what took place."

"You're probably right about that," smiled Morgan, and there was a sarcastic ring in his voice. "Just the same, I'd like to have a few words with her."

"You know as well as I do, Mr. Morgan, that that would be impossible."

Morgan raised his eyebrows. "I don't get you," he said.

"Well, to be more explicit, then, you know that my wife does not live here."

"Here's a new game," thought Morgan. There was no doubt that Marsh was openly fencing with him. In fact, the man seemed to know every move which had been made. At last the super-criminal of literature seemed to have stepped into actual life. Morgan was certain that some crime had been committed, and the circ.u.mstantial evidence against this man had been acc.u.mulating rapidly. Yet, as he faced him and thought it over, he realized how intangible was their hold upon Marsh. Of course, when they got this man down to Headquarters they might force him to give more explicit details regarding his past and present actions, but a man so clever as this had probably left little behind him that would convict him of anything; certainly not of his connection with whatever had taken place in the apartment above. The cuff b.u.t.ton, even, seemed to be growing doubtful in value.

These reflections on Morgan's part flashed through his mind so quickly that there was only the slightest pause between Marsh's last statement and the next question.

"What would give you that impression?" asked Morgan.

"Your man went through my apartment yesterday, and I'm sure he found no evidence of a lady occupying it with me."

Morgan found it difficult to conceal his astonishment, not only at the statement, but the man's intimate knowledge of things of which he was supposed to be in ignorance. Then he remembered the clandestine listener at his door, and his doubts of a moment before took flight.

"It is quite evident," declared Morgan, "that you, or someone connected with you, have taken an unusual interest in the movements of the Chicago Police Department. Why?"

"I have taken no special interest in what you have been doing," said Marsh. "It was not difficult to note that almost from the time I called the attention of your man on the beat to the occurrence, your men have been regarding me with suspicion. I cannot possibly understand why this should be so, but you will admit that it is a fact, won't you?"

Morgan remained silent.

"I could not help noticing," continued Marsh, "that the man who had been conducting an investigation in this house was keeping watch across the street. Happening to glance back after entering a taxicab yesterday, I observed this man entering another taxi, which followed mine downtown. It was obvious to the most ordinary intelligence that he was following me. After I reached the 'loop' district I was absolutely sure of it. Then, when I returned and found footmarks in my apartment, it was quite evident that someone had been investigating."

Morgan was stunned. "Footmarks!" he thought. "Had Tierney been so clumsy and careless as to enter the flat with muddy shoes?"

Something had to be done to cover an awkward pause, and give him a chance to gather his wits, so Morgan took out the package of cigarettes. After helping himself to one, he tossed the package to Marsh. Morgan noted with satisfaction that the man took one before handing the package back. Marsh smoked cigarettes!

"Why did you follow Miss Atwood?" Morgan suddenly shot at him.

Marsh's face expressed surprise. "Follow Miss Atwood!" he exclaimed.

"That's what it looked like," a.s.serted Morgan.

"Well, that WAS a strange coincidence," commented Marsh.

Morgan found it hard to determine whether this was a reply or an evasion. He decided, however, that matters had gone far enough, and that Marsh must either prove himself innocent, or stay in jail until they could definitely fasten his guilt upon him. To bring matters to a head, he reached into his pocket for the cablegram.

"You said that Mr. Ames, the man who rents the flat upstairs, was a friend of yours."

"I believe I did," admitted Marsh.

"Well, I have a cablegram here from Mr. Ames," stated Morgan, as he brought out the paper. "Read it."

Marsh leaned forward, took the cablegram, read it gravely, and returned it to Morgan.

"You have certainly got me tied up," he said.

"Tight as a drum!" agreed Morgan. "The game's up, Marsh. You're coming with me to Headquarters."

"I'm afraid you have sort of spilled the beans, Morgan," laughed Marsh, rising.

Morgan, however, was used to the last minute plays of cornered criminals. Leaning back in his chair, and smiling encouragingly, his hands, without seeming purpose, were slipped into the side pockets of his coat. The right hand quickly gripped a revolver in readiness.

"Yes," continued Marsh, "I had hoped to work quietly, but this incident has upset my plans. Yet, after all, perhaps we can work together with greater success."

"Now we come to the 'divvy' proposition," thought Morgan. He remained expectantly silent, however, and his face still wore its encouraging smile.

Marsh came closer and the end of the concealed revolver barrel moved upward just a trifle. The next moment the smile on Morgan's face faded out and his eyes filled with an astonished stare.

Marsh had thrown back his coat, revealing the badge of the United States Secret Service!

CHAPTER VIII

A DEFINITE CLUE

"You can take your hand off that gun now," suggested Marsh, as he smiled at Morgan and went back to his chair. "I'll tell you my part of the story, and perhaps we'll find in the end that two heads are better than one."