"Good! Now, so far, we ain't got any man in this case except Barker."

Carroll shook his head.

"You're wrong there."

"How?"

"Somewhere in this town is some man who is interested in the woman with whom Warren was planning to elope. Don't forget this, Leverage—I let Barker ramble on. I like to hear 'em talk. The minute he jumped at the idea that the woman in the taxi was Miss Gresham, I knew perfectly well that he knew she was not. I also believe that he knows who the woman was. Further, I believe that she is socially prominent. That being the case, it is a safe guess that there is some man who might commit a murder, provided he knew in advance of the elopement. Our task now is to discover that woman and, through her, the man interested."

Leverage frowned thoughtfully.

"Listens good," he volunteered at length. "Another thing—Barker admits he was shooting pool in Kelly's place last night around midnight; and Kelly's place is only half a block from the Union Station. That sounds significant!"

"It does; and then again it may mean nothing. What I am striving for is to make William Barker feel that he is safe. The safer he feels, the more readily he will talk. No matter how many lies he tells, everything that he says is of value. He didn't know, of course, that we already had a perfect alibi for Miss Gresham; but even if we hadn't, his assumed belief that she committed the crime would have assured me that she did not. No-o, I think we'd better not arrest the man unless he forces our hand—tries to jump town, or something like that. Better let him remain at large and talk frequently. If he has anything to betray, there's more chance that he'll do it that way. Don't you think I'm right?"

"I wouldn't admit it if I didn't, Carroll. I've seen you in action too often to believe you're ever wrong."

Carroll flushed boyishly.