"Open the door."
"I can't. It's locked."
"Who is in there?" called the book-keeper.
Of course, Hal did not answer.
"Perhaps it was a rat," suggested Ferris.
"Might have been," grumbled Churchley. "I know there are plenty of them in the building, because I once ran across one in the hall-way."
"Where is the key?" asked Hardwick. "We'll soon find out."
"I don't know."
"It ought to be in the lock."
"Perhaps Jackson carted it off. He's an odd sort of a coon."