I'm in it, and I'm losing none of the motion, but what's turning the thing is more than I can make out." He looked at Ashton-Kirk. "What place is this?" he asked.

"It's a lodging-house, kept by a Mrs. Dolan. And it happened that several lines of action converged here. But," and he took the automatic from the bed where he had thrown it and thrust it into his pocket, "there is nothing more to be done here, so we may just as well go while the gentlemen across the hall are still absorbed."

He put on a shabby coat, and with a worn hat pulled well down upon his head, he opened the door and took a look out into the hall.

"Quick, now!" said he to Scanlon. "It's important that you should not be seen, for your acquaintance with these people may be valuable still."

Bat slipped through the doorway and down the hall, and when Ashton-Kirk followed a few moments later, he found the big man awaiting him in the shadows of the alley.

"Where to?" asked Bat.

"There is a taxi station near here," said the investigator; "we'll need a cab."

They walked through the silent street and finally saw the illuminated sign of a garage; they got into a cab, Ashton-Kirk saying:

"Police headquarters."

The taxi rolled rapidly on its way; block after block was pa.s.sed. Bat endeavored to reopen the matter of his finding the investigator in the house they had just left, but Ashton-Kirk did not seem disposed to talk; he sat in one corner of the cab, apparently deep in thought. At length they brought up before the enormous pile in which the police, together with other munic.i.p.al departments, had their headquarters. Their feet echoed hollowly as they walked through the marble corridor; a drowsy elevator man ran them up to the desired floor, and in a moment more they were in the department devoted to the detective branch of the police.

A man with a deeply-marked face and iron-gray hair sat at a desk.

"h.e.l.lo, Scanlon!" greeted he, affably.

"How are you, Sarge?" replied Bat. "Doing your little night trick, eh?"

"Yes." The old plain-clothes man yawned a little. "Nothing exciting in it, either; hasn't been a thing stirred since I came on." Then with an indication of interest: "But maybe you've got something that'll help keep us awake."

"Osborne," said Ashton-Kirk. "Is he here?"

The old headquarters man bent his brows at the shabby figure; the slouch, the leering look, the head aggressively thrust forward, marked it plainly as of the cla.s.s against which he had been pitted for years.

"Yes," he replied, briefly.

"We'd like to see him."

"Right through the door," said the veteran detective.

The two pa.s.sed through the door indicated, and saw the burly figure of Osborne, comfortably installed in an easy chair, reading a newspaper.

"h.e.l.lo," said he, sitting erect. "That you, Scanlon?"

"Me, with a friend." Bat grinned, highly entertained. "He wants to have a little talk with you, I think."

Osborne examined the figure before him attentively. Ashton-Kirk leaned against the office rail, his hands in his pockets, the rat-like thief to the life. The detective examined him carefully, but no ray of recognition came into his face. Then, like throwing off a garment, Ashton-Kirk allowed the mannerisms he had a.s.sumed to drop from him.

Osborne at once sat erect with a laugh of pleasure at his own lack of penetration.

"Good!" said he. "You almost fooled me." He arose and shook the criminologist's hand. "But what's the idea?"

"I've just been paying a little visit," replied Ashton-Kirk. He seated himself upon the edge of a desk. "Anything new?" he asked.

"Not much. We've still got young Burton, of course, but he's about as close-mouthed a proposition as I ever had anything to do with. He says he isn't guilty, but that's all he _will_ say. We've given our evidence to the district attorney's office, and they'll pa.s.s it on to the Grand Jury in a few days."

"You've still got it in your mind that he's the person you want, have you?"

Osborne crossed one leg over the other and put his thumbs in the armholes of his vest.

"I have," acknowledged he. "I've had a good bit of experience in these things, and it looks pretty straight to me. We've got the motive, all right, and it's a strong one. I think a good case can be built up around that, the candlestick and the testimony of the maid and nurse. As a matter of fact," with professional complacence, "I've seen more than one man go to the chair with less evidence against him."

"But suppose there were some other little points to be taken into consideration?" asked Ashton-Kirk. "As I see it, you are restricting yourself to a very narrow field. The sort of life the Bounder led is well known to every one. Do you suppose he was without enemies? Is it not possible that others may have had motives for dealing the blow that ended his life?"

Osborne nodded his head, but his comfortable att.i.tude did not change.

"Sure," said he. "That's so. I've no doubt that Tom Burton, in his time, double-crossed a dozen 'guns' that would have been only too glad of a chance to 'get' him. But they didn't do it; no one but the man we've got had the chance that night. They weren't near enough."

The investigator bent toward the speaker, his eyes steadily upon his face.

"How sure are you of that?" said he.

Osborne took his thumbs from the armholes of his vest

"I'm certain," he replied. "There wasn't any one around but them we know of. And that being the case there couldn't be----"

But Ashton-Kirk stopped him.

"Just one moment! Don't you think you are rather offhand in saying 'and that being the case'? Are you quite sure that it is the case?"

Osborne pulled himself up straight in his chair and stared at the investigator. Bat Scanlon, watching and listening, felt a little stir of excitement as he realized what his friend was about.

"He's getting him worked up into a state of doubt," was Bat's opinion.

"In a minute he'll have him so he won't know what he believes."

However, there was more than this in the big athlete's thoughts. The way Ashton-Kirk took to bring doubt to the mind of the headquarters man awoke a vague distrust in that of Scanlon. The question of motive filled him with uneasiness--that as to the likelihood of a person other than young Burton being near enough to strike the death blow, turned him cold and helpless.

"You've got something on your mind," said Osborne to the investigator.

He arose to his feet and stood with shoulders squared and legs very wide apart. "What's it all about?"

From his coat pocket Ashton-Kirk drew a glittering little revolver.

"I picked this up on the lawn at No. 620 Duncan Street the morning I went over the place," said he, quietly.

The big headquarters man almost s.n.a.t.c.hed the weapon from his hand, so disturbed was he at this announcement. With greedy eyes he inspected it.

"Smith & Wesson," said he. "Twenty-two calibre, five chambers, all loaded." He stood weighing the revolver in his hand and looking at the investigator. "Anything more?" he asked.

"I saw undoubted indications of a woman's presence--a woman who had been lurking outside the house and peering in at the window of the room in which the Bounder was killed."

"A woman!" Quick excitement was in Osborne's face. "Why, one of the first things I said when the news came in was----" He stopped, a frown wrinkled his brow and he shook his head. "Indications are one thing, but proof is another," he said. "Suppose it was shown that a woman _was_ hanging around outside the house that night?--suppose she carried this gun? What would that get us? She wasn't inside--therefore she couldn't have killed the Bounder. And then, again, the man was killed by a blow on the head. He wasn't shot."

Ashton-Kirk shrugged his shoulders with the air of one who had relieved himself of a responsibility.