“What have you found?” the latter asked.
“Nothing yet but bad air and stone walls!” replied Jimmie.
“What are you looking for?” was the next question.
“A way out!” answered Jimmie.
Carl came down the steps and the two boys examined the chamber carefully for some evidence of a hidden exit. They were about to abandon the quest when Jimmie struck the handle of his pocket knife, which he had been using in the investigation, against a stone which gave back a hollow sound. Carl rushed to his side instantly.
“Here you are!” Jimmie cried. “There’s a hole back of that stone. If we can only get it out, we’ll kiss the savages ‘good-bye’ and get back to the Ann in quick time.”
The boys pried and pounded at the stone until at last it gave way under pressure and fell backward with a crash.
“There!” Jimmie shouted. “I knew it!”
CHAPTER XIX.
WHERE THE PASSAGE ENDED.
“Yes, you knew it all right!” Carl exclaimed, as the boy stood looking into the dark passage revealed by the falling of the stone. “You always know a lot of things just after they occur!”