“Yes, but how are we to get out?” questioned Darry, in dismay. “I see no way to reach that hole, do you?”

“We’ll have to find a way,” returned Frank, resolutely.

This was easier said than done. Nothing was at hand by which to climb up to the opening. After a vain search around both boys came to a halt again.

“We’re stumped,” faltered Darry. “We’ll have to find some other way out. This is some hole on the mountain side that I never heard of.”

“Let us set up a shout,” suggested Frank. “Somebody may be passing this way.”

He yelled at the top of his lungs and Darry did the same. Their voices echoed and re-echoed through the abandoned coal mine, but no answer came back.

“I guess very few people come this way,” said Darry. “It’s a lonely neighborhood.”

“I’m going to try it again,” answered our hero, and shouted once more.

“Help! help!”

Again he waited, and fancied he now heard a cry in return. Then he renewed his efforts.