"They've done it, whatever it is," said Ralph, and ran back speedily to No. 93 and Roberts. The latter stood with his ear bent in the direction of the runaway, and his usually jolly face was serious. "What's up, Fairbanks?" he asked at once. "A smashup, I judge," answered Ralph. "Can you dig out any lanterns?" "Red?" "Yes." "Those two on the end of the tender are all right. There's another under my seat, if it hasn't got smashed." "Run back with the two and signal both tracks," ordered Ralph. "I'm going ahead to see what has happened." Ralph fished among the litter in the dismantled cab and found and lit the lantern referred to by Roberts. Then he started ahead down the tracks. When he arrived at the switch he could trace that it had recently been set for a siding. A little farther on footsteps in the snow showed where some one had jumped from the runaway locomotive. Ralph paused at this spot for only a moment. He went down the siding, which curved in and out among a series of bluffs and gullies. As he remembered it, the siding was not of great length, and ended at the side of a granite pit. A last turn brought him in full view of this. Ralph paused, a good deal wonderstruck. Thirty feet down at the bottom of the gully lay a tangled wreckage of wood and iron. There had apparently stood two cars where the runaway had struck. One of them held a derrick outfit, the other some heavy excavating machine. The two cars had been forced headlong into the abyss. The runaway engine piling down upon them had completed the work of ruin. "I can't understand it," spoke Ralph, after a long spell of inspection and thought. "What possible object could any one have in view in smashing up that machinery?" Then it occurred to him that his pursuit of the runaway might have frightened its operator from his original purpose, and he had changed his plans and abandoned the locomotive to its later course. "A pretty bill for the Great Northern to settle, all the same," reflected Ralph, as he started back the way he had come. At the switch he turned the target to open main, and made his way forward till he reached No. 93. Roberts had set the danger signals behind them, and he stood on the side of the embankment dismally surveying the wreck of his pet locomotive. Ralph told him of the situation ahead. "I can't understand it," confessed the puzzled fireman. "No more can I," said Ralph. "I wish we could have caught the man who got away, though." "What are we going to do?" "Wait for instructions, of course. There is nothing due out or in for some time to come, unless the Limited comes on. The out track is clear for her, if she does. We must get word to Preston, some way." "That isn't far away," suggested Roberts. "Too far to cover in any reasonable time. I want to get at your tool box, Roberts." "All right."