In the east a silvery glow trembled above the horizon and to the magic of its touch silhouettes sprang suddenly from vague, blurred masses. The agave, known to most as the century plant, showed the delicate slenderness of its arrowy stem and marked its conical head with feathery detail. The flower-covered spikes of the Spanish bayonets became studies in ivory, with the black shadows on their thorny spikes deep as charcoal. The giant cacti, boldly thrown against the silver curtain, sprang from their joining bases like huge, thick telegraph poles of ebony, their thorns not yet clearly revealed. The squat sage, now resolved into tufted masses, might have been the purplish-leaden hollows of a great sea. The swift rustlings became swift movements and the "side-winder" uncoiled his graceful length to round a nearby sage bush. The quaking of a small lump of sand grew violent and a long, round snoot pushed up inquiringly, the cold, beady eyes peering forth as the veined lids parted, and a Gila monster sluggishly emerged, eager for the promised warmth. To the northeast a rugged spur of mountains flashed suddenly white along its saw-toothed edge, where persistent snows crowned each thrusting peak. A moment more, and dazzling heliographic signals flashed from the snowy caps, the first of all earthly things to catch the rays of the rising sun, as yet below the far horizon. On all sides as far as eye could pierce through the morning twilight not a leaf stirred, not a stem moved, but everywhere was rigidity, unreal, uncanny, even terrifying to an imaginative mind. But wait! Was there movement in the fogging dark of the north? Rhythmic, swaying movement, rising and falling, vague and mystical? And the ghostly silence of this griddle-void was broken by strange, alien sounds, magnified by contrast with the terror-inspiring silence. A soft creaking, as of gently protesting saddle leather, interspersed with the frequent and not unmusical tinkle of metal, sounded timidly, almost hesitatingly out of the dark along the ground.