"Well, of all things!" gasped Jimmie, sitting up in bed.
"I see it!" cried Ned. "When the door is opened and that snap comes, the wire should be taken away. The wire, you see, forms a circuit and a concealed motor swings the door. I believe it will stay open if you take the wire away when it snaps. Try it again, boys!" he urged.
Again the wire was inserted in the holes. Again the door swung open and again the snap was heard. Quickly motioning to the boys to break the circuit, Ned was delighted to notice the whirring noise stop.
"Where are your searchlights, boys?" he asked. "Jimmie, have you still got your automatic handy? They didn't take it away, I hope."
"I dropped it when I fell from the Rat's aeroplane," confessed Jimmie. "I couldn't hang onto it all the way. Why didn't you pick it up?"
"We were busy," replied Ned in suppressed excitement. "Anybody else got a gun? I have mine and also have a searchlight."
"Here's mine," announced Jack, producing the weapon.
"And mine," echoed Harry, bringing forth his own automatic.