“What’s that mass of rock on the cliff top?” asked Merritt suddenly; “it looks something like a human figure.”
They all gazed up. A big mass of rock was poised at the summit of the cliff. There was a large rock with a smaller one perched on the top of it. To a vivid imagination it might have suggested a body and a head.
“It’s worth investigating, anyway,” decided the major; “we’ll look at the face of the cliff directly beneath it. Maybe there is an opening there.”
But this decision was more easily arrived at than carried out. Thorny brush and thick, tall weeds shrouded the base of the cliff for a height of eight or ten feet. But the Boy Scouts had their field axes with them, and before long the blows of the steel were resounding. In a few minutes they had cleared away a lot of the brush directly beneath the two poised stones.
The major and the professor, with Jumbo looking rather awe-stricken at the major’s side, stood watching.
“These balanced stones prove my theory that all this is of glacial origin,” the professor was saying. “Some antediluvian water course must have left them there. Why, it wouldn’t take much of a push to shove them over.”
“That is true,” agreed the major; “in that case, supposing that an entrance does exist at this spot, they would block it effectually.”
“Very much so,” agreed the professor dryly; “in fact——”
“Hoo-r-a-y!”
The shout rang gladly through the silent woods. The boys had thrown down their axes and stood with flushed, triumphant faces turned toward the elder members of the party. The major was quick to guess the cause of their excitement.