"That's my idea!" answered the caretaker.

"Do you think the boys are hiding in the mine?"

"Well, there are some things connected with the case which point in that direction," replied Canfield. "For instance, there's a lot of queer things going on underground."

"Ghosts?" demanded Tommy.

"You're not steering us up against a haunted mine, are you?" asked
George with a wink at his chum. "That would be too good to be true!"

"I haven't said anything about ghosts or haunted mines," chuckled the caretaker. "I'm only saying that there are queer things taking place in the mine. Now there's Tunnel Six," he went on, "I have seen lights there with my own eyes, when I know there wasn't a person within two miles of the spot except myself. And I've heard noises, too! These unaccountable noises which make a man think of graveyards and ghosts."

"But why should two healthy, active boys want to seek such a hiding place?" asked Will. "It certainly can't be very pleasant in the dark and damp tunnels! Besides, where would they get their provisions?"

"I'm not arguing the case, lads," the caretaker replied, "I'm placing the case in your hands without instructions. I only suggest that you look in the mine first, but you don't have to do that unless you want to!"

"I don't see how we can find fault with that arrangement!" laughed Will. "And now," he went on, let's arrange about our lodgings. In the first place, who knows that we are here on this job?"

"Not a soul, unless some one saw you coming into the breaker!"