Straight down through the blackness he hurtled, with a wild cry of terror.
The others heard that cry. They heard a far-off crash, and then the clatter of falling rock.
Joe was the first to shout.
"Frank!" he called.
There was no answer. The echoes rang back.
Although the other boys shouted time and again there was no answer from Frank Hardy. They searched frantically, casting the beams of their lights here and there, but they found no trace of him.
CHAPTER XIII
Stolen Supplies
The other boys searched for nearly an hour, but Frank Hardy seemed to have disappeared literally into the bowels of the earth.
With only their flashlights to illuminate the huge cave, they found it difficult to conduct the search with any degree of satisfaction. They blundered here and there, not at all certain that they were anywhere near the place where their companion had disappeared.