“Why, what’s the matter, Bobby?” cried Laura. “That is not a spring lock.”
“Huh! I guess not,” returned Bobby. “But somebody’s sprung it on us, just the same.”
“What do you mean?” demanded Nellie Agnew.
“The door’s locked,” declared Laura, reaching the bottom step and trying the knob herself.
“You bet it is,” said Bobby.
“It’s a joke!” gasped Eve.
“I should hope so,” returned Laura. “If they were in earnest it would be bad for us. John will leave the building soon, and how will we attract anybody to release us?”
“Oh, Laura!” cried Nell. “Nobody would be so mean.”
“It may be,” said Eve, thoughtfully, “that somebody went past, saw the door open, and closed and locked it with no idea that we were in the tower.”
“Well!” exclaimed Bobby, at that. “We’re in a nice fix—yes?”