“Sticks—nothing!” growled Brad.

“Then what——”

“It’s locked!”

“Locked?”

“Sure as shooting.”

“It can’t be.”

“I opine I know when a door is locked,” said the Texan; “and this yere door is locked tight and fast.”

“How could it happen? I’m sure there is not a spring lock on the door.”

“Not at all, professor. I wonder some if this is one of Dick’s tricks. I wonder if he locked us in here?”

“Why should he do that?”