Suddenly, without forerunner or warning, a vivid flash of lightning cleft the clouds and a roar of thunder rattled and boomed from the mountain peaks. And on the instant, as one animal, hurled by sudden fright, the whole band of cattle was on its feet and plunging forward. There was a snorting breath, a second of muffled noise as they sprang to their feet, and the whole stampeded herd was rushing pell-mell into the darkness. They chanced to head toward Mead, and he, idling along with one leg over his saddle horn, with a quick jab of the spur sent his pony in a long, quick leap to one side, barely in time to escape their maddened rush. A second's delay and he and his horse would have been thrown down by the sheer overpowering mass of the frenzied creatures and trampled under their hoofs, for the horn of a plunging steer tore the leg of his overalls as the mad animals passed. Away went the herd, silent, through the dense blackness of the night, running at the top of their speed. And Mead, spurring his horse, was after them without a moment's loss of time, galloping close beside the frightened beasts, alertly watchful lest they might suddenly change their course and trample him down. They ran in a close mass, straight ahead, paying heed to nothing, beating under their hoofs whatever stood in their way. They rushed crazily on through the darkness which was so intense that Mead's face seemed to cleave it as the head cleaves water when one dives. He galloped so close to the running band that by reaching out one arm he could almost touch one or another heaving side. But he could see nothing, not a tossing horn nor a lumbering back of the whole three hundred steers, except when an occasional flash of lightning gave him a second's half-blinded glimpse of the plunging mass. By hearing rather than by sight he could outline the rushing huddle at his right hand. And watching it as intently as if it had been a rattlesnake ready to strike, he galloped on by its side in a wild race through the darkness, over the plain, up and down hills, through cactus and sagebrush, over boulders and through treacherous, tunneled prairie dog towns, plunging headlong into whatever might be in front of them. From the rushing herd beside him there came the muffled roar of their thousand hoofs, overtoned by the constant popping and scraping of their clashing horns. The noise filled his ears and could not quite be drowned even by the rattling peals of thunder. Swift drops of rain stung his face and the water of a pelting shower dripped from his hat brim and trickled from his boot heels. The beating rain, the vivid flashes of lightning and the loud peals of thunder drove the maddened creatures on at a still faster pace. Mead put frequent spurs to his horse and held on to the side of the mob of cattle, bent only on going wherever they went and being with them at the dawn, when it might be possible to get them under control.