The boy had taken the precaution to bring a rifle with him. When he saw them flee in this terrified manner, the thought came to him at once that he would shoot one of them, and take a portion back to his friends for their supper. It would to a grand exploit for him, and he would be prouder of its performance than he was of the construction of the wonderful steam man. The lumbering, rolling gait of the buffaloes was not a very rapid one, and the boy found himself speedily overhauling them without difficulty. They did not know enough to separate, but kept close together, sometimes crowding and striking against each other in their furious efforts to escape. But, after the chase had continued some time, one of the animals began to fall in the rear, and Johnny directed his attention toward him, as he would be the most easy to secure. This fellow was a huge bull that was slightly lame, which accounted for his tardiness of gait. Frightened as he was, it was not that blind terror which had seized the Indians when they discovered the steam man so close at their heels. The bull was one of those creatures that if closely pressed would turn and charge the monster. He was not one to continue a fruitless flight, no matter who or what was his pursuer. The boy was not aware of this sturdy trait in the animal, nor did he dream of anything like resistance. So he steadily drew toward him, until within twenty yards, when he let go of his controlling rod, and picked up the rifle beside him. A bullet from this, he supposed, would kill any animal, however large, no matter at what portion of his body he aimed. So raising partly to his feet, and steadying himself as well as he could, he aimed for the lumping haunch of the animal. The ball buried itself in his flank, and so retarded his speed, that the next moment the boy found himself beside him. The instant this took place, the bull lowered his head, and without further warning, charged full at the steam man. The boy saw the danger, but too late to stave it off. His immense head struck the rear of the monster with such momentum that he was lifted fully a foot from the ground, the concussion sounding like the crack of a pistol. Fortunately the shock did not materially injure the machine, although the frightened boy expected to be capsized and killed by the infuriated buffalo. The latter, when he had made his plunge, instantly drew back for another, which was sure to be fatal if made as fairly as the first. The boy retained his presence of mind enough to let on full steam, and the concern shot away at an extraordinary rate, bounding over the ground so furiously that the billets of wood were thrown and scattered in every direction, so that now, from being the pursuer, he had speedily become the pursued. The tables were turned with a vengeance!