Andrews made no answer to George; instead he shouted a command to the engineer: "Reverse your engine, and move backwards at full speed!" The engineer, without asking any questions, did as he was told. Jenks ran through to the second car and contrived, after some delay caused by the roughness of the motion, to uncouple it from the third. This last car was now entirely loose from the train, and would have been left behind had it not been that the engine had already begun to go back. Faster and faster moved "The General" to the rear. "Go forward again," finally ordered Andrews. The engine slowly came to a standstill, and then plunged forward once more. Now George could see the meaning of this manoeuvre. The third car, being uncoupled, went running back towards the enemy's tender. Andrews hoped to effect a collision. But the engineer of the pursuing locomotive was evidently ready for such an emergency. He reversed his engine, and was soon running backwards. When the baggage car struck the tender no harm was done; the shock must have been very slight. In another minute the enemy's engine was puffing onward again in the wake of the fugitives, while the car was being pushed along in front of the tender. "That didn't work very well," said Andrews, placidly. "Let's try them again." Once more "The General" was reversed. This time the second car was uncoupled and sent flying back. "The General" was now hauling only the tender and the one baggage car in which the majority of the members of the party were confined. The second attempt, however, met with no better result than the first: the enemy pursued the same tactics as before; reversing the locomotive, and avoiding a serious collision. It now started anew on the pursuit, pushing the two unattached cars ahead of it, apparently little hampered as to speed by the incumbrance. And now, unfortunately enough, the bridge was in plain view, only a few hundred yards ahead. As the enemy turned a new curve George caught a view of the tender. A dozen men, armed with rifles, were standing up in it; he could see the gleam of the rifle barrels. "More oil," ordered Andrews. The boy seized the can, and poured some more of the greasy liquid into the fiery furnace. He knew that the wood was almost exhausted, and that it would soon be impossible to hold the present rate of progress. Oh, if there only would be time to burn the bridge, and thus check the pursuers! But he saw that he was hoping for the impracticable. "Shall we stop on the bridge?" asked the engineer, in a hoarse voice. "It's too late," answered Andrews. "Keep her flying." Over the bridge went the engine, with the pursuers only a short distance behind. "Let us have some of that kindling-wood for the furnace," shouted Andrews to the men in the baggage car. The men began to pitch wood from the door of the car into the tender, and George transferred some of it to the furnace.