word to one of his companions, and a sudden fear
came upon Frank. Was the man ordering his arrest? He could not afford to
be detained and bothered at that time. How would he solve the mystery if
they placed him under arrest?

But Frank had nerve, and he would not take to his heels, knowing such an
act would make it seem certain that he was guilty.

The receiving teller spoke sharply to the cashier, seemingly urging him
to some action; but the boy heard the cashier reply:

"It will spoil the whole thing to be too hasty."

"The boy can be made to peach on the gang," said the teller, in a
guarded tone.

"That's folly!" declared the cashier, shortly. "The boy is not
connected with the gang. Think they would send him here--to a bank--if
he were! Have a little sense, Burton!"

The teller mumbled, looking sullen and rebuffed, while Frank felt
relieved.

Then the cashier once more questioned Frank, as a lawyer might question
a witness. He tried, in various ways, to entrap the boy, but Frank made
no blunders.

After a time, the cashier seemed satisfied.

"I am sorry for you," he said. "You have lost a hundred dollars, but you
are fortunate to escape arrest and imprisonment."

"I suppose I am," admitted Frank; "and I will tell you something, now; I
propose to solve the mystery of this money. I am going to find that
girl, I am going to find out how she came to have the bogus stuff, and I
am going to bring this band of queer-makers to book, if possible."

The receiving teller laughed scornfully.

"A fine bluff!" he muttered.

The cashier gave him a crushing glance.

"You have undertaken a big job, my boy," said the latter. "I hardly
think you will be able to carry it out when government detectives are
bothered."

"I'll do my best."

"And you'll be pretty sure to get into further trouble."

"I may, but I am lucky about getting out of trouble."

"Yes, you are dead lucky," muttered the receiving teller.

The cashier gave Frank some outspoken advice, and then told the boy he
might go.

Frank left the private office and walked out of the bank. There was a
look of determination on his face.

"I don't fancy being beaten out of a hundred dollars," he said to
himself. "It's not the money so much; but if that girl knew--if she
played me----"

He stopped short, anger and disgust expressed on his face. His pride was
touched. He did not like to think that he had been thus deceived.

"I am going to know!" he vowed.