"That's all right, Andy; that is the way you would have a right to figure it out if you were running a special on a normally healthy railroad—you'd be justified in running to your next telegraph station, regardless. But the Red Butte Western is an abnormally unhealthy railroad, and you'd better feel your way—pretty carefully, too. From Point-of-Rocks you can see well down toward Little Butte. Tell Williams to watch for 204's headlight, and if he sees it, to take the siding at Silver Switch, the old Wire-Silver spur."

Bradford nodded, and when Lidgerwood reimmersed himself in the cattleman's claim papers, went forward to share Williams's watch in the cab of the 266.

Twenty minutes farther on, the train slowed again, made a momentary stop, and began to screech and grind heavily around a sharp curve. Lidgerwood looked out of the window at his right. The moon had gone behind a huge hill, a lantern was pricking a point in the shadows some little distance from the track, and the tumultuous river was no longer sweeping parallel with the embankment. He shut his desk and went to the rear platform, projecting himself into the group of sight-seers just as the train stopped for the second time.

"Where are we now?" asked Miss Brewster, looking up at the dark mass of the hill whose forested ramparts loomed black in the near foreground.

"At Silver Switch," replied Lidgerwood; and when the bobbing lantern came nearer he called to the bearer of it. "What is it, Bradford?"

"The passenger, I reckon," was the answer. "Williams thought he saw it as we came around Point-o'-Rocks, and he was afraid the despatcher had got balled up some and let 'em get past Little Butte without a meet-order."

For a moment the group on the railed platform was silent, and in the little interval a low, humming sound made itself felt rather than heard; a shuddering murmur, coming from all points of the compass at once, as it seemed, and filling the still night air with its vibrations.

"Williams was right!" rejoined the superintended sharply. "She's coming!" And even as he spoke, the white glare of an electric headlight burst into full view on the shelf-like cutting along the northern face of the great hill, pricking out the smallest details of the waiting special, the closed switch, and the gleaming lines of the rails.

With this powerful spot-light to project its cone of dazzling brilliance upon the scene, the watchers on the railed platform of the superintendent's service-car saw every detail in the swift outworking of the tragic spectacle for which the hill-facing curve was the stage-setting.

When the oncoming passenger-train was within three or four hundred yards of the spur track switch and racing toward it at full speed, a man, who seemed to the onlookers to rise up out of the ground in the train's path, ran down the track to meet the uprushing headlight, waving his arms frantically in the stop signal. For an instant that seemed an age, the passenger engineer made no sign. Then came a short, sharp whistle-scream, a spewing of sparks from rail-head and tire at the clip of the emergency brakes, a crash as of the ripping asunder of the mechanical soul and body, and a wrecked train lay tilted at an angle of forty-five degrees against the bank of the hill-side cutting.