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 horizon line. Gradually, however, as time passed, it began to enlarge, to creep down the slope, to encroach upon the intervening distance.

"Bess, what do you make them out?" asked Venters. "I don't think they're rustlers."

"They're sage-riders," replied Bess. "I see a white horse and several grays. Rustlers seldom ride any horses but bays and blacks."

"That white horse is Tull's. Pull the black, Bess, I'll get down and cinch up. We're in for some riding. Are you afraid?"

"Not now," answered the girl, smiling.

"You needn't be. Bess, you don't weigh enough to make Black Star know you're on him. I won't be able to stay wiith you. You'll leave Tull and his riders as if they were standing still."

"How about you?"

"Never fear. If I can't stay with you I can still laugh at Tull."

"Look, Bern! They've stopped on that ridge. They see us."

"Yes. But we're too far yet for them to make out who we are. They'll recognize the blacks first. We've passed most of the ridges and the thickest sage. Now, when I give the word, let Black Star go and ride!"

Venters calculated that a mile or more still intervened between them and the riders. They were approaching at a swift canter. Soon Venters recognized Tull's white horse, and concluded that the riders had likewise recognized Black Star and Night. But it would be impossible for Tull yet to see that the blacks were not ridden by Lassiter and Jane. Venters noted that Tull and the line of horsemen, perhaps ten or twelve in number, stopped several times and evidently looked hard down the slope. It must have been a puzzling circumstance for Tull. Venters laughed grimly at the thought of what Tull's rage would be when he finally