“I wish----” Virginia was beginning when she stopped.

From the darkness behind them came a piercing scream. It echoed like thunder through the sleeping stillness of the valley. It brought the remaining girls tumbling from their tent. The four by the campfire exchanged startled, incredible glances.

“That was Val’s voice!” Phyllis said with an effort.

“Come on, Jim!” Tom was already disappearing into the sagebrush. Behind him was Jim and the girls trailed after. No one proposed to be left alone in camp.

But, uncertain as they were of the exact spot from whence the scream had come, they thrashed about in the darkness finding nothing. Finally Tom held up a commanding hand for silence.

“Listen!” he ordered.

There was borne to them on the night air the pounding of hoofs. For a time they were heard and then the sound died slowly into silence.

“Horses!” Janet said incredibly. “But who--why--who screamed?” she demanded.

Jim was off at top speed for the spot where the horses must have been when they started. When the rest joined him he was bending over examining hoof marks with the aid of a burning pine faggot. He stamped the torch out when he saw the girls and turned to lead the way back to camp. There he bent serious glances upon all of them.

“Tom,” he said finally, “saddle your horse and ride to the ranch for yore father and some men. Don’t lose any time about it either. There’s something mighty funny goin’ on up here and we’re goin’ to need help.”