"Can you fasten it?"
"Yes, very easy. Big lock, strong lock, and key in it."
"All right," said Jack. "Now you keep watch on, the men below. I'll be back soon."
CHAPTER XIV.
JACK'S PLAN.
He hurried to the ground floor, and in a dozen swift words laid his plan before his friends.
"Frightful risky!" said Jim, "Frightful risky! I don't say there's nothing in it, but a big risk."
"We stand in fearful danger now, Jim," said Jack. "I know it's only a chance, but we've got to do something, or these fellows will wipe us out for a certainty."