“Lookout down there,” yelled Roy, in warning. “Get on the up side!”

But that did not appear possible. The earth began to slide under Ranger, and that impeded Helen's progress. He got in advance of her, straining on the bridle.

“Let go!” yelled Roy.

Helen dropped the bridle just as a heavy slide began to move with Ranger. He snorted fiercely, and, rearing high, in a mighty plunge he gained solid ground. Helen was buried to her knees, but, extricating herself, she crawled to a safe point and rested before climbing farther.

“Bad cave-in, thet,” was Roy's comment, when at last she joined him and Bo at the top.

Roy appeared at a loss as to which way to go. He rode to high ground and looked in all directions. To Helen, one way appeared as wild and rough as another, and all was yellow, green, and black under the westering sun. Roy rode a short distance in one direction, then changed for another.

Presently he stopped.

“Wal, I'm shore turned round,” he said.

“You're not lost?” cried Bo.

“Reckon I've been thet for a couple of hours,” he replied, cheerfully. “Never did ride across here I had the direction, but I'm blamed now if I can tell which way thet was.”