Sid made a slight sound and attempted to turn over. Two grunts answered him. Immediately a strange Indian was at his side helping him turn over roughly, and he learned for the first time that his arms were pinioned behind. Sid looked up into the buck’s face. It was round, hawklike and stern, with narrow black eyes that had no pity. He recognized the type as Apache instantly. There was none of the stolidity of the Pima and the Papago in that face, nor of the regular-featured, straight-nosed Navaho, like Niltci, who resembled a copper-colored Englishman. This man looked more like some bird of prey, in the Roman hook of his nose and the craggy sternness of his mouth. The first word he uttered as he turned to his young companion confirmed Sid’s thought, for it was in the harsh Athapascan dialect of the Apache. Between them they yanked the boy to his feet and started up the hill. Nothing further was said. They passed Blaze’s niche, the dog still lying on his side, a pathetic furry heap dominated by the arrow, and one of the Apaches pointed and let out a grunt. The other nodded. Evidently they considered him dead. They pushed Sid on down into the arroyo and crossed to where lay the ram. The older man then grunted a few words and at once set about paunching the game. The younger led on with Sid. As they topped the rise of the next ridge, that same flat red rampart that Sid had noticed while stalking the ram burst on his view. But now it proved to be a really wonderful natural phenomenon. Fire, lava, a tremendous outpouring of the bowels of the earth had been at work here, no doubt during that period when the craters were formed and it had cast up that mighty red wall. Sid wished that Scotty, with his knowledge of geology, were with him now to study out the wonder of this vast red rampart before his eyes. The whole interior angle made by the bend of the mountains had been blown out here by lava explosion, the huge granite strata having been forced up on end like a pair of trap doors, making two enormous red ramparts, vertical-sided and running out from the rocky angle of the hills until their outer ends rose like towers. These terminated the red walls, a thousand feet from the ridge to the end of the lower gap where the lava had burst out. At that lower end the ramparts rose at least four hundred feet sheer from the granite slopes, and a great apron of black and scowling lava ran down from there at a steep slope, to lose itself under the sands far below. But the walls were of sheer granite, colored red by the fierce heat of that molten lava of ages ago.