Gale drew a long, deep breath. The mood which had presaged pursuit, strife, blood on this somber desert, returned to him tenfold. He saw Thorne's face corded by black veins, and his teeth exposed like those of a snarling wolf. These rangers, who had coolly risked death many times, and had dealt it often, were white as no fear or pain could have made them. Then, on the moment, Yaqui raised his hand, not clenched or doubled tight, but curled rigid like an eagle's claw; and he shook it in a strange, slow gesture which was menacing and terrible.

It was the woman that called to the depths of these men. And their passion to kill and to save was surpassed only by the wild hate which was yet love, the unfathomable emotion of a peon slave. Gale marveled at it, while he felt his whole being cold and tense, as he turned once more to follow in the tracks of his leaders. The fight predicted by Belding was at hand. What a fight that must be! Rojas was traveling light and fast. He was gaining. He had bought his men with gold, with extravagant promises, perhaps with offers of the body and blood of an aristocrat hateful to their kind. Lastly, there was the wild, desolate environment, a tortured wilderness of jagged lava and poisoned choya, a lonely, fierce, and repellant world, a red stage most somberly and fittingly colored for a supreme struggle between men.

Yaqui looked back no more. Mercedes looked back no more. But the others looked, and the time came when Gale saw the creeping line of pursuers with naked eyes.

A level line above marked the rim of the plateau. Sand began to show in the little lava pits. On and upward toiled the cavalcade, still very slowly advancing. At last Yaqui reached the rim. He stood with his hand on Blanco Diablo; and both were silhouetted against the sky. That was the outlook for a Yaqui. And his great horse, dazzlingly white in the sunlight, with head wildly and proudly erect, mane and tail flying in the wind, made a magnificent picture. The others toiled on and upward, and at last Gale led Blanco Sol over the rim. Then all looked down the red slope.

But shadows were gathering there and no moving line could be seen.

Yaqui mounted and wheeled Diablo away. The others followed. Gale saw that the plateau was no more than a vast field of low, ragged circles, levels, mounds, cones, and whirls of lava. The lava was of a darker red than that down upon the slope, and it was harder than flint. In places fine sand and cinders covered the uneven floor. Strange varieties of cactus vied with the omnipresent choya. Yaqui, however, found ground that his horse covered at a swift walk.

But there was only an hour, perhaps, of this comparatively easy going. Then the Yaqui led them into a zone of craters. The top of the earth seemed to have been blown out in holes from a few rods in width to large craters, some shallow, others deep, and all red as fire. Yaqui circled close to abysses which yawned sheer from a level surface, and he appeared always to be turning upon his course to avoid them.

The plateau had now a considerable dip to the west. Gale marked the slow heave and ripple of the ocean of lava to the south, where high, rounded peaks marked the center of this volcanic region. The uneven nature of the slope westward prevented any extended view, until suddenly the fugitives emerged from a rugged break to come upon a sublime and awe-inspiring spectacle.