Evidently he had been doing a good deal of thinking during the ride; certainly he had watched Smoky. When he stopped under the bank opposite the half-mile post he dismounted more spryly than one would have expected. His eyes were bright, his voice sharp. Pop was forgetting his age.

“I guess I'll ride yore horse m'self,” he announced, and they exchanged horses under the shelter of the bank. “You kin take an' ride Boise-an' I want you should beat me if you kin.” He looked at Bud appraisingly. “I'll bet a dollar,” he cried suddenly, “that I kin outrun ye, young feller! An' you got the fastest horse in Burroback Valley and I don't know what I got under me. I'm seventy years old come September—when I'm afoot. Are ye afraid to bet?”

“I'm scared a dollar's worth that I'll never see you again to-day unless I ride back to find you,” Bud grinned.

“Any time you lose ole Pop Truman—shucks almighty! Come on, then—I'll show ye the way to the quarter-post!”

“I'm right with you, Pop. You say so, and I'm gone!”

They reined in with the shadow of the post falling square across the necks of both horses. Pop gathered up the reins, set his feet in the stirrups and shrilled, “Go, gol darn ye!”

They went, like two scared rabbits down the smooth, yellow stretch of packed sand. Pop's elbows stuck straight out, he held the reins high and leaned far over Smoky's neck, his eyes glaring. Bud—oh, never worry about Bud! In the years that lay between thirteen and twenty-one Bud had learned a good many things, and one of them was how to get out of a horse all the speed there was in him.

They went past the quarter-post and a furlong beyond before either could pull up. Pop was pale and triumphant, and breathing harder than his mount.

“Here 's your dollar, Pop—and don't you talk in your sleep!” Bud admonished, smiling as he held out the dollar, but with an anxious tone in his voice. “If this is the best running horse you've got in the valley, I may get some action, next Sunday!”

Pop dismounted, took the dollar with a grin and mounted Boise—and that in spite of the fact that Boise was keyed up and stepping around and snorting for another race. Bud watched Pop queerly, remembering how feeble had been the old man whom he had met at the corral.