"Keeck!" he snarled, continuing to swing the whip. "Keeck! Keeck! I can keeck, too!" He swung his arm till it ached, when he stopped. Whereupon the horse settled down. But his eyes were ablaze and he was trembling all over. Also, while undoubtedly suffering added distress from the taut and binding traces, he continued to stand at right angles to the mare--head high, nostrils quivering, mouth adrip with white slaver--until the spirit of rebellion appeared to grip him afresh. With a convulsive heave he moved again, making another quarter turn, which brought him clear of the tongue and facing the vehicle. Then he set up a nervous little prancing, whisking his tail savagely, now and again lifting his heels as if to strike. That was all. He gained no ground forward, nor did it appear as if he would ever move forward. "You--you--" began Felipe, then subsided, evidently too wrathful for words. And he remained silent, gazing wearily toward the settlement, as though about to call assistance. The stillness was heavy and portentous. Both horses were motionless. Felipe continued silent. Off toward the settlement all was still. Overhead, the early-morning sky pressed low, spotless and shimmering, brooding. Around and about, the flies seemed to stop buzzing. Everywhere lurked the quiet. The earth appeared bowed in humiliation, hushed in prayer as for the unfortunate one, while up and down the trail, basking in world-old light, lay dust of centuries, smug and contented in its quiescence. All nature was still, gripped in tense quiet. The crack of a whip broke it. Felipe, suddenly bestirring himself, had sprung forward and dealt the horse a blow with the butt. Across the nose, it had sounded hollow and distant; and the horse, whipping up his head in surprised pain, now turned upon the man a look at once sorrowful and terrible, a look which spelled death and destruction. Nor did he only look. With a strange outcry, shrill and piercing, awaking the canyon in unnatural echoes, he whirled in his harness and reared, reared despite his harness, and struck out with venomous force. It was quick as a lightning flash, but, quick as it was, Felipe avoided it. And it was fortunate that he did. Terror-stricken and dropping the whip, he sped to the rear, to a point behind the cart, and there turned amazed eyes at the pirouetting horse. What manner of horse was this, he asked himself. Could it be that this horse, black as night, was truly of the lower regions? Certainly he looked it, balancing there on his hind legs, with his reddened eyes and inflamed nostrils! And--But what was this? From the corral had come a shrill nicker, the voice of the aged mare. But that was not it! With the outcry, seemingly an answer to the black's maddened outcry, the black dropped to all-fours again, turning quick ears and eyes in the direction of the sound! What manner of horse was this, anyway? Never before had he seen such a horse! He felt himself go limp.