“I don’t know what we’ve struck, but we know that wasn’t no coyote’s call,” declared Case.

“It had a human sound,” interrupted Jule.

“Listen!” warned Buck. “We’ll hear it again in a moment. I thought I heard it then.”

“That was only rain,” explained Alex. “The first one might have been that, too.”

At that instant, before another word could be spoken, a great light flashed out, followed by a shrill scream.

CHAPTER X

A BIT OF DYNAMITE

“That’s Tommy!” whispered Jule.

“But the light? Who turned that on?” Alex whispered in reply to the suggestion.

“It doesn’t seem to be the thing to do—showing a light just at this time,” Clay commented.