he asked himself more than once. Were they, too, caught underground, or had the awful landslide carried them down into the valley and buried them?
In the course of his climbings Dave presently came to a new turn, one which had before escaped his attention. This turn led upward and gave him fresh hope. But, just as he fancied that he was getting close to the outer air, he reached a flat wall, and further progress in that direction was out of the question.
His heart sank like lead in his bosom, and he walked slowly back to the point from which he had started. How to turn next he did not know.
Half an hour passed, and Dave was almost in despair. His torch had reached its end and was on the point of going out. Then, not knowing what else to do, he set up a cry for help.
There came no reply, and he cried again. Then he pulled out his pistol and fired a shot.
The discharge of the weapon echoed and reëchoed throughout the cave and brought down several small stones. Then, to Dave's intense surprise and joy, an answering shot came back.
"Who is it?" he yelled. "I am here! This way! This way!"
"Hello!" was the long-drawn-out answer, coming from some point that appeared to be over his head. "Where—are—you?"
