ws?"

"No, we found a way out," came the answer in a few moments.

"Bully!" shouted Billy. "That lets you out, boys. We don't need to dig
any more."

The boys in the gully scrambled out of it in great glee, and then set up
a shout which was soon answered at a less distance than before, and
shortly after that they heard Jack's voice from somewhere above them
saying:

"Hello, you fellows! We are up here. How are we going to get down?"

The boys all looked up and saw Jack Sheldon and Dick Percival standing
on top of the ledge, at the foot of which was the entrance of the cave.

"How did you get there?" asked Blaisdell. "We were trying to dig you
out, but we are glad we don't have to."

"Dig us out?" asked Percival in astonishment.

"Yes. When the boulder fell it sent down a lot of stones and earth, and
completely blocked the entrance of the cave."

"Then it was fortunate we found the other entrance," said Jack.

"Another one?"

"Yes, in the woods over yonder, a wild place, wilder than this. We'll
tell you all about it when we get down."

Jack and Percival now quickly joined their companions, who were eager to
learn of their experiences in the cave.

The boys were greatly interested in hearing of what Jack and Dick had
discovered in the cave, and speculated about the presence of the
burglars' tools, some of them wondering if the bank robbers made the
cave their headquarters, and why the tools had not been taken away
before.

"Well, if the place is closed I shall have a picture of it at any rate,"
declared Billy.

"Which cannot amount to much," laughed Harry, "seeing that your camera
has neither shutter nor lens."

"Never you mind," said Billy. "That camera of mine is going to surprise
you boys."

CHAPTER XX

WHAT BILLY'S CAMERA REVEALED

As it was now getting well along in the afternoon, and as the way back
was a difficult one, Percival and Jack decided that they would better
return without making any further explorations.

"We have found out a lot that we did not know, anyhow," said Percival,
"and we can come here again."

"Certainly I never knew about that cave," remarked Arthur, "although I
have been here two years."

"That is not so much to be wondered at," declared Harry. "The place is
hard to get at and out of the way, and I don't believe you could get
many of the boys to come here even if you told them there was a cave to
be seen. I don't think I would care to come again."

"I