Gale's hand went swiftly to the ranger's shoulder.

"Laddy. Don't kill Diablo unless it's to save your life."

"All right. But, by God, if I get a chance I'll make Blanco Sol run him off his legs!"

He spoke no more and set about changing the length of Sol's stirrups. When he had them adjusted to suit he mounted and rode down the trail and out upon the level. He rode leisurely as if merely going to water his horse. The long black rifle lying across his saddle, however, was ominous.

Gale securely tied the other horse to a mesquite at hand, and took a position behind a low rock over which he could easily see and shoot when necessary. He imagined Jim Lash in a similar position at the far end of the valley blocking the outlet. Gale had grown accustomed to danger and the hard and fierce feelings peculiar to it. But the coming drama was so peculiarly different in promise from all he had experienced, that he waited the moment of action with thrilling intensity. In him stirred long, brooding wrath at these border raiders--affection for Belding, and keen desire to avenge the outrages he had suffered--warm admiration for the cold, implacable Ladd and his absolute fearlessness, and a curious throbbing interest in the old, much-discussed and never-decided argument as to whether Blanco Sol was fleeter, stronger horse than Blanco Diablo. Gale felt that he was to see a race between these great rivals--the kind of race that made men and horses terrible.

Ladd rode a quarter of a mile out upon the flat before anything happened. Then a whistle rent the still, cold air. A horse had seen or scented Blanco Sol. The whistle was prolonged, faint, but clear. It made the boood thrum in Gale's ears. Sol halted. His head shot up with the old, wild, spirited sweep. Gale leveled his glass at the patch of mesquites. He saw the raiders running to an open place, pointing, gesticulating. The glass brought them so close that he saw the dark faces. Suddenly they broke and fled back among the trees. Then he got only white and dark gleams of moving bodies. Evidently that moment was one of boots, guns, and saddles for the raiders.

Lowering the glass, Gale saw that Blanco Sol had started forward again. His gait was now a canter, and he had covered another quarter of a mile before horses and raiders appeared upon the outskirts of the mesquites. Then Blanco Sol stopped. His shrill, ringing whistle came distinctly to Gale's ears. The raiders were mounted on dark horses, and they stood abreast in a motionless line. Gale chuckled as he appreciated what a puzzle the situation presented for them. A lone horseman in the middle of the valley did not perhaps seem so menacing himself as the possibilities his presence suggested.

Then Gale saw a raider gallop swiftly from the group toward the farther outlet of the valley. This might have been owing to characteristic cowardice; but it was more likely a move of the raiders to make sure of retreat. Undoubtedly Ladd saw this galloping horseman. A few waiting moments ensued. The galloping horseman reached the slope, began to climb. With naked eyes Gale saw a puff of white smoke spring out of the rocks. Then the raider wheeled his plunging horse back to the level, and went racing wildly down the valley.