Three hours ago he had been eating a peaceful breakfast with his friend and commandant, Colonel Miguel de Castanar, in the sunlit patio of the commandant's hacienda. Castanar, chief of the air patrol for the district, had waxed enthusiastic over the suppression of last spring's revolutionists and the cowed state of up-country bandits. Captain Freddie Kirby, American instructor of flying to Mexican pilots in the making, had agreed with him and asked for one of the Wasps and three days' leave with which to go visiting in Laredo. The simple matter of a broken fuel line, a forced landing two hundred kilometres from nowhere, and the unlucky proximity of the not-so-cowed horsemen, were the things which had changed the day from what it had been to what it was. The one piece of good fortune which had befallen him since the bandits had surrounded the wrecked Wasp, looted it, and taken its lone pilot prisoner, was the break he was getting now. During the squadron's first halt to feed, he had knocked down his guards and made a bolt for the grazing stallion. So far, the attempt was proving worth while. * * * * * On and on the stallion lunged toward the white mountains. Kirby's eyes became red rimmed now from fatigue and the glare of the sun and the dust of the pitilessly bare plateau. A negligible scalp wound under his mop of straw-colored hair, slight as it was, did not add to his comfort. But still he would not give up, for the horse, as if it sensed what its rider needed most, was making directly for a narrow ravine which debouched on the plateau from the nearest mountain flank. It was the promise of cover afforded by the jagged rocks and jungle growth of that ravine which kept hope alive in Kirby's throbbing brain. The stallion was blown and staggering. Foam from the heavily bitted mouth flashed back in great yellow flakes against Kirby's dust-caked aviator's tunic. But just the same, the five mile gallop had carried both horse and rider beyond range of any but the most expert rifle shot. And Kirby knew that if his own splendid mount was almost ready to crash, the horses of his pursuers must be in worse shape still. So for the third time since the fight had begun, he laughed. This time there was no harshness, but only relief, in the sound which came from his dry lips. Ten minutes later, he flung himself out of his saddle. Like the caress of a vast, soothing hand, the shadowed coolness of the ravine lay upon him. As his feet struck ground, they splashed in the water overflowing from a spring at the base of an immense rock. At once Kirby dropped the reins on the stallion's neck, giving him his freedom, and as the horse lowered his head to drink, Kirby stooped also.