Having refreshed himself, he touched a patent lighter to another cigarette, chose a direction at random, and spurred his pony into a canter. The beast held to the pace until the ascent of a low but steep ridge brought him down to a walk. With the change of gait the hunter paused in the act of lighting a fresh cigarette, to gaze up at the sapphire sky. The air was reverberating with a muffled sound like distant thunder. Yet the crystal-clear dome above him showed no trace of a cloud all across from the magnificent snowy ranges on the east and north to the sparsely wooded mountains and sage-gray mesas to the south and west. "Can't be thunder," he murmured--"no sign of a storm. Must be a stream. Ah! cool, fresh water!" The sharp-roweled spurs goaded the pony up over the round of the ridge as fast as he could scramble. At the top he broke into a lope and raced headlong down the other side of the ridge through the tall brush. The reverberating sound of water was clearer but still muffled and distant. The rider let his reins hang slack and recklessly dug in his spurs. The pony leaped ahead with still greater speed and burst out of the brush on to a narrow open slope that led down to the brink of a canyon. The hunter saw first the precipice on the far side of the yawning chasm--then the near edge, seemingly, to his startled gaze, right under his horse's forefeet. He was dashing straight at the frightful abyss. A yell of terror burst from his lips, and he sought to fling himself backwards and sideways out of the saddle. His instinctive purpose was to fall to the ground and clutch the grass tufts. But in the same moment that he tried to throw himself off, the nimble pony swerved to the left so abruptly that the man's effort served only to keep himself balanced on the saddle. Had he remained erect or flung himself to the other side he must have been hurled off and down over the precipice. Nor was the danger far from past. Carried on down the slope by the momentum of their headlong rush, the plunging pony "skidded" to the very brink of the precipice. Though the man shrank down and sought to avert his face, he caught a glimpse of the black depths below them as, snorting with fear, the pony wrenched himself around on the rim shelf of the edge. For an instant--an instant that was an age of sickening suspense to his rider--the pony toppled. But before the man could shriek out his horror, the agile beast had recovered his balance and was scrambling around, away from the edge. He plunged a few yards up the slope, and stopped, wheezing and blowing. The man flung the reins over the pony's head and slipped to the ground. For a minute or longer he lay outstretched, limp and white-faced. When he looked up, the pony was stolidly cropping a tuft of grass. Beasts are not often troubled with imagination. The hunter remembered his brandy flask. After two long pulls at its contents, the vivid coloring began to return to his cheeks.