"We must be about that distance from the highest point here." "Then there is no reason why there should not be a reservoir above us," said Harry.

"Water would filter through these rocks, all right." The boys passed on in a southwesterly direction to the end of the tunnel, which was about fifty feet from the opening.

Here they found a chamber about 10x16 feet in size.

At the south side of this chamber was a trough-shaped place cut in the rock, and through this a small rivulet of water ran.
"I knew the people who built this shop wouldn't put in their time where no water could be procured," declared Fenton.

"Why, this is simply fort, a mountain residence, where valley people came in time of war and secreted themselves.