fastened the iron chain, and threw the barrier back.
One after the other the boys entered the open ing beyond. At first they could see but little, but gradually their eyes became accustomed to the gloom and they made out a rocky chamber about twelve feet wide and running back in irregular shape for a hundred feet or more. At some points the ceiling was so low they had to stoop, while elsewhere it was far above their reach. The flooring was fairly level, with rock in some places and hard dirt in others.
The opening was rudely furnished with a heavy table and a bench, and close to one wall was a box bed, still filled with pine boughs. On a big wooden hook hung a man's coat, so decayed that it began to fall apart when they touched it. The table contained several tin cups and plates, all rust eaten.
"This is certainly a curious find," said Flapp. "How did you happen to hit it, Gus?"
"I was exploring the cliff above when I happened to slip and fall into the bushes just in front of the door. I was shook up but not hurt, and when I got up I saw the door and wondered what it meant. Then I looked inside and after that went back to camp to tell you fellows about it."
"It will make a dandy place for secret meet-
