“Get down, driver,” said June firmly, “and assist me to alight, if my brother is not gentleman enough to do so.” The driver sprang down at once, but Arlington grasped his sister’s arm to restrain her. At this moment a big dog pounced upon another in front of the building, and the fighting, snarling animal was under the feet of the horse in a twinkling. With a snort, the animal sprang away, the reins being jerked from the hands of the driver. Arlington had partly risen to his feet, and the sudden leap of the horse flung him backward over the seat to the ground. June Arlington was the only occupant of the carriage as the runaway dashed wildly down the main street of the town. Dick had witnessed this occurrence. He made a leap down the steps, but was too late to reach the horse. Chester Arlington sat up, looking dazed and frightened. “Stop that horse!” he cried, in genuine alarm. “A hundred dollars to the man who stops that horse!” Even as he uttered the words, Dick Merriwell caught a bicycle from the hands of a boy who had ridden up and was standing beside his machine. On to the bicycle leaped the captain of the eleven, alighting in the saddle and catching the pedals instantly with his feet. Away he went after the runaway, somewhat slowly at first, but with swiftly increasing speed. “Hi! hi! Runaway! Runaway!” “Look out for that horse!” “The girl will be hurt!” “She may be killed!” “Look at the fellow on the bike!” “He can’t catch the horse!” “Couldn’t stop him if he did!” The crowd rushed away after the runaway, shouting loudly. Others ran out from offices and stores. In a twinkling the whole street was swarming with excited persons. Dick bent over the handlebars and pedaled with all the strength and skill he could command. He felt that it was to be a race for life, and he set his teeth, his heart filled with the win-or-die determination that had made him remarkable on the gridiron. A farmer turning in from another street barely reined his horse aside in time to avoid a collision. He caught a glimpse of the pale face of the girl in the carriage. A man ran out and waved his arms at the horse, but he jumped aside when the animal came straight on without swerving. Another dog darted after the runaway, barking furiously and adding to its terror and speed. June turned and looked back. She saw the bicyclist coming after her, and she was not so frightened that she failed to recognize Dick Merriwell. The dog that had barked at the horse got in Dick’s road and barely sprang aside in time. Had the wheel struck the animal Dick’s pursuit might have ended there in a twinkling. It was astonishing how fast young Merriwell flew over the ground. He strained every nerve. Dick soon saw he was gaining. Fortunately the street was long and straight, and the runaway kept a fairly straight course. The reins were on the ground, and it seemed that the girl could do nothing to help herself. Once she partly rose, as if to spring from the carriage.