It was leaping now, only touching the high places. Had he been a less skilful rider he would have been hurled from the saddle. Discretion was thrown to the winds. It was no time to measure possibilities or look out for his personal safety. He had to take chances. His siren warned all comers to give him the road. A team was hauled up on its haunches by the frightened driver; an automobile drew so hastily to one side that two wheels went into the ditch. He caught a glimpse of startled faces at doors and windows as he passed. Like a meteor he flashed by, all his heart and soul wrapped up in the thought of rescue.

Now he had overtaken the locomotive and was running parallel to it. The Mogul swayed and lurched as it tore along with all steam up on its mission of destruction. Steadily the rider drew up on even terms, with less than twenty feet separating the tracks from the high road. Then the motorcycle swept into the lead and increased it with every bound.

Only two miles more to the quarry! His heart exulted as he realized that he would get there first. But the margin would be fearfully close. The switch might prove rusty and refuse to work. Some part of it might be out of gear. For years it had been utterly abandoned. What a bitter jest of fate if, after reaching it ahead of the locomotive, he should have to stand helplessly by and see it dash past on its errand of slaughter.

Then, too, a third factor entered into the problem. There was No. 56. She was a limited express and famous for her speed. The operator at Corridon had said that on this stretch of road, supposed to be clear, she would make up time. If she reached and passed the switch before the runaway, no power on earth could prevent a frightful disaster. And just then, while this fear was tugging at his heart, a faint whistle in the distance drove all the color from his face. 56 was coming!

He dared not take his eyes from the road in front, but he knew from the lessened noise behind him that he was increasing his lead. And then as he swept around a slight curve in the road, the abandoned quarry came into view. There were the empty shacks, the deserted platform and, a few rods further on, the switch.

He raced to the tracks and threw himself from the machine, almost falling headlong from the momentum, although he had turned off the power. Then he grasped the lever and tried to throw the switch.

It groaned and creaked, but, although it protested, it yielded to the powerful young muscles that would not be denied. But, when it had moved two-thirds of the way it balked, and, despite his frenzied attempts, refused to budge another inch. And now the runaway engine was coming close, rumbling and roaring hideously, while round the curve, a scant quarter of a mile away, appeared the smokestack of No. 56.

Looking wildly about for the obstacle, he saw that a stone had been wedged into the frog. He tried to remove it, but the turning of the switch had jammed it against the rail. Straightening up, he swung the lever far enough back to release the stone. He worked as if in a nightmare. Fifty feet away, the Mogul was bearing down like a fire-breathing demon. With one swift movement he threw the stone aside; with the next he bowed his back over the lever until it felt as though it would break. Then the rusted rails groaned into place; with an infernal din and uproar the runaway took the switch. Scarcely had it cleared the track when 56 thundered past, its wheels sending out streams of sparks as the brakes ground against them.

The Mogul struck the bumpers with terrific force, tore them away and leaped headlong against the wall of the quarry. There was a crash that could be heard for miles, and the wrecked locomotive reared into the air and then rolled over on its side, enveloped in smoke and hissing steam.

As soon as the long train of 56 could be stopped, the throttle was reversed and it came gliding back to the switch. The engineer and fireman sprang from their cab, conductor and trainmen came running up, and the passengers swarmed from the cars.