The moose, meanwhile, had been in doubt whether to attack with his antlers, as was his manner when encountering foes of his own kind, or with his knife-edged fore-hoofs, which were the weapons he used against bears, wolves, or other alien adversaries. Finally he seemed to make up his mind that Last Bull, having horns and a most redoubtable stature, must be some kind of moose. In that case, of course, it became a question of antlers. Moreover, in his meetings with rival bulls it had never been his wont to depend upon a blind, irresistible charge,--thereby leaving it open to an alert opponent to slip aside and rip him along the flank,--but rather to fence warily for an advantage in the locking of antlers, and then bear down his foe by the fury and speed of his pushing. It so happened, therefore, that he, too, came not too violently against the barrier. Loudly his vast spread of antlers clashed upon the steel meshes; and one short prong, jutting low over his brow, pierced through and furrowed deeply the matted forehead of the buffalo. As the blood streamed down over his nostrils, obscuring one eye, Last Bull quite lost his head with rage. Drawing off, he hurled himself blindly upon the barrier--only to be hurled back again with a vigor that brought him to his knees. But at the same time the moose, on the other side of the fence, got a huge surprise. Having his antlers against the barrier when Last Bull charged, he was forced back irresistibly upon his haunches, with a rudeness quite unlike anything that he had ever before experienced. His massive neck felt as if a pine tree had fallen upon it, and he came back to the charge quite beside himself with bewilderment and rage. [Illustration: "Only to be hurled back again with a vigor that brought him to his knees."] By this time, however, the keepers and Park attendants were arriving on the scene, armed with pitchforks and other unpleasant executors of authority. Snorting, and bellowing, and grunting, the monstrous duellists were forced apart; and Last Bull, who had been taught something of man's dominance, was driven off to his stable and imprisoned. He was not let out again for two whole days. And by that time another fence, parallel with the first and some five or six feet distant from it, had been run up between his range and that of the moose. Over this impassable zone of neutrality, for a few days, the two rivals flung insult and futile defiance, till suddenly, becoming tired of it all, they seemed to agree to ignore each other's existence.