"Time to beat it!" muttered Dan. "We've disturbed some animal that lives here."
"Sh!" ordered Prescott, holding up one hand. "Greg!"
Against their ear-drums came again, rather faintly, the sound of something moving.
"If you're Greg, you keep on making the noise until I locate you," urged Dick. "Fellows, you stay right where you are. Don't move."
Once more that sound of something moving came to the boys, and Dick, on tip-toe, moving softly, ranged toward the direction from which he believed the noise had come. As Dick moved away from them with the light, Dave and Dan found themselves in comparative darkness.
"If that's you, Greg, keep on making all the noise you can," directed young Prescott, as he neared one of the jutting ledges of rock.
A distant snort came as though in answer.
"If that's you, Greg, you can do it again," cried Dick in a low, eager voice. "If it's you, do it just four times."
Then Dick halted, realizing in the stillness that he could hear his own heart beating rapidly.
Again came the snort—one, two, three—four times. Then it stopped.