"Someone's been here before us," he exclaimed. "The ground is too well worn to be accidental."
"Look! Look!" pointed Nanette. Her face had become pale from the excitement of her discovery. "What is it, Aaron?"
Carruthers bent forward to examine the strange footprint. It was nearly two feet across and divided in the center, as if the animal that made it had but two toes.
"From the size of the tracks and the length of the animal's stride, I should say it was some form of an amphibious dinosaur long extinct in our own world."
"Are they dangerous?"
"It all depends upon the species. Some of them are pure vegetarians; others are carnivorous. The heavy tramping we heard during the night evidently came from the beast who left these footprints."
hey had come upon the footprints where the path made a turn, leading into a dense growth of trees and underbrush. And as Carruthers knelt beside the path he heard a rustle as of something moving directly behind him. Wonderingly, he turned his head to trace the disturbance. But the woods seemed empty. "Strange," he murmured. "Did you hear something moving in back of us, Nan?"
Nan shook her head. "You don't think we're in any danger from these beasts, do you?"