"Nemmine whether they is or not. You get out of the habit."
"Rats," sneered Fat Jakey.
"What was that?" Jack Harpe's figure tautened in a flash.
"Rats," repeated Fat Jakey.
"I thought I heard something," persisted Jack Harpe.
"You heard rats," chuckled Fat Jakey. "You're nervous, that's what's the matter, or else you ain't able to open the safe."
"I can open the safe all right," growled Jack Harpe, bending again to his work.
"I wonder what he did hear," Racey said to himself. "I thought I heard something, too."
Whatever it was he did not hear it again.
"There she is," said Jack Harpe, suddenly, and threw open the safe door.