"I don't believe it is very safe in here," said Dave. "This cave must have been formed by that landslide, and, if so, perhaps the dirt and rocks haven't finished settling yet. I don't want any rocks to come down on my head!"
"Nor on any of us!" added the senator's son.
"I've got an idee thet we are a-comin' to another openin'," remarked Abe Blower, a few minutes later, after they had made a sharp turn to the right.
"Why so?" asked Roger.
"I kin feel some fresh air from somewhere."
"I feel it too," returned Dave. "Doesn't it come from overhead?"
"Mebbe, lad; although I thought it was ahead."
"Here is that stream of water!" cried Roger, as they made another turn. "But we can't get at it," he added, somewhat disappointedly.
"Why?"
"It's down below the split in the rocks. Look!"