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had extraordinary lung capacity and very large nostrils. Their endurance was as remarkable as their physical structure.

In a cloud of dust they plowed up the prairie, driving the grazing buffalo back and forth, and covering acres of ground in their struggle. The crash of heads and rattle of horns gradually diminished in vigor of sound, indicating that the speed and strength of the rivals were wearing down. Not so their ferocity and courage! It was a battle to death or complete vanquishment. In time the dust cloud blew away on the wind, and then the bulls could be seen in action less strenuous but still savage.

The old monarch was near the end of his last battle. His race was run. Torn and dirt-covered and bloody, he backed before the onslaughts of his foe. His lungs, like great bellows, sent out gasps that were as well utterances of defeat. He could not withstand the relentless young bull. Age must go down. He was pushed to his knees and almost bowled over. Recovering, he wearily fronted that huge battering black head, and then was shoved to his haunches. Again, narrowly, he escaped the following lunge. That was the moment of defeat. He was beaten. The instinct for life took the place of the instinct for supremacy. Backward, step by step, he went, always facing the bellowing young conqueror. There came intervals when he was free of that lowered battering head; and during the last of these he sheered away among the stragglers of the herd, leaving the field to the victor. The old