To attach the rope to it was the work of a second, and then as Harry started up the engine the half-suffocated man and boy were hauled out of the pit. It took quite a little time for old man Joyce to recover, but Frank was soon himself again. As soon as he could talk Mr. Joyce told the boys that in their rage and fury at finding that he was the wrong man and not Bart Witherbee whom they had intended to kidnap, Barr and his associates had lowered him into the mine shaft, and then on the threat of shooting down it and killing him, had made him undo the rope, which they then hauled up.

“I wonder what became of Barr’s other auto?” queried Frank as the boys and their friend, the sheriff, surrounded by an admiring crowd, walked back toward the town.

“Why, Barr said it had gone on ahead,” replied Frank. “Maybe he wasn’t telling the truth, though, and it’s still here.”

But the other auto had gone on ahead, as the boys found out later, and in it had also gone the Slade aeroplane, repairs on which had not been finished. But White Willow, having suddenly come to be regarded by Luther Barr, for obvious reasons, as unhealthy, it had been decided to hustle the machine out of town on the motor car.

“But,” exclaimed Harry, when the boys heard of this from some men in the town who had seen the aeroplane loaded onto the automobile, “that is an infraction of the rules of the race. The contestants must proceed under their own power.”

“Well, we’d have a hard time proving they did such a thing,” rejoined Frank, “so the best thing for us to do is to buckle down and make up for lost time. We’d better get right over to Gitalong in the auto, pick up the others, and start on our way. You can drive over with Mr. Joyce, and I’ll fly the Golden Eagle over.”

The rejoicings in Gitalong on the part of the young adventurers may be imagined when they saw the auto coming, speeding over the level rolling plain with the aeroplane flying high above it. The sheriff and his prisoner followed on horseback. With warm handshakings and amid a tornado of cheers and revolver shots, the boys started off once more on their way half an hour later, more determined than ever to win the great prize.

CHAPTER XX.
CAUGHT IN A STAMPEDE.

That night, as may be imagined, the adventurers spent in hearty sleep. Although they had no means of knowing how far behind they were in the race, at the same time they were too exhausted by the exciting events through which they had passed to consider anything except refreshing their wornout frames. But boy nature is a wonderful thing, and both Mr. Joyce and Bart Witherbee were hard as nails, so when the entire party awoke the next day—well over the border line into Arizona—they were as refreshed as if they had rested a week.

Breakfast was over, the auto packed and everything ready for a start when suddenly in the distance a low growling was heard, something like the voice of an approaching thunderstorm.