Onward again went the chase, mile after mile, over a rough track, at a frightful speed, the people along the route looking on with wondering eyes. It seemed marvellous that the engines could cling to those unevenly-laid rails. The escape of the pursuers, was, indeed, almost miraculous, for Andrews found time to stop just beyond a curve and lay a loose rail on the track, and Fuller's engine ran upon this at full speed. There came a terrific jolt; the engine seemed to leap into the air; but by a marvellous chance it lighted again on the rails and ran on unharmed. Had it missed the track not a man on it would have lived to tell the tale. The position of the fugitives was now desperate. Some of them wished to leave the engine, reverse its valves, and send it back at full speed to meet the foe. Others suggested that they should face the enemy and fight for their lives. Andrews was not ready to accept either of these plans. He decided to go on and do the work for which they had set out, if possible. He knew the road. There was a covered bridge a few miles ahead. If they could burn this all would be well. He determined to try. There was one box-car left. That might serve his purpose. He had his men pile wood on its floor, and light this with coals from the engine. In a minute it was burning. The draught made by the rushing train soon blew the fire into a roaring flame. By the time the bridge was reached the whole car was in a fierce blaze. Andrews slowed up and uncoupled this blazing car on the bridge. He stopped the engine just beyond, and he and his companions watched it hopefully. The flames curled fiercely upward. Dense smoke poured out at each end of the covered bridge. Success seemed to be at length in their hands. But the flames failed to do their work. The roof of the bridge had been soaked by recent rains and resisted the blazing heat. The roaring flames were uselessly licking the wet timbers when the pursuing engine came dashing up. Fuller did not hesitate for a minute. He had the heart of a soldier in the frame of a conductor. Into the blinding smoke his engine was daringly driven, and in a minute it had caught the blazing car and was pushing it forward. A minute more and it rolled into the open air, and the bridge was saved. Its timbers had stubbornly refused to burn.