gazed at the four boys curiously.

"What brought you here?" he asked.

"We thought we might know something of this affair," said Dick,
and told his story.

"There may be something in that," said the detective.
"Especially if those men fail to turn up at that tenement again."

"Did you mention a man named Mooney?" cried Fredericks.

"I did."

"Do you know this Mooney?" put in Mr. Wilder to the bookkeeper.

"Subrug, the janitor, has a brother-in-law named Mooney -- a wild
kind of a chap who used to hang around more or less."

"We'll call Subrug in and find out where this Mooney is now,"
said Charles Rush.

The janitor proved to be a very nervous old man. "I don't know
where Mooney is," he said. "He's been a constant worry to me.
He used to borrow money, but lately I wouldn't give him any more,
and so he stopped coming around."

"Was he ever in here?"

The janitor thought for a moment. "I think he was, sir -- about