Shortly after he had seated himself in one of the platform camp-chairs, the train, which had been rocketing down a wide valley with an isolated ridge on one hand and a huge mountain range on the other, came to a stand at one of the few-and-far-between stations. The pause, one would say, should have been only momentary; but after it had lasted for a full minute or more the solitary smoker on the rear platform left his chair and went to lean over the platform railing for a forward glance.

Looking down the length of the long train, he saw the lights of the small station, with other lights beyond it which seemed to mark a railroad crossing or junction. On the station platform there were a number of lanterns held high to light a group of men who were struggling to lift a long, ominous-looking box into the express-car.

A little later the wheels of the train began to trundle again, and as his car-end passed the station the smoker on the observation platform had a fleeting glimpse of the funeral party, and of the heavy four-mule mountain-wagon which had apparently served as its single equipage. Also, he remarked what a less observant person might have missed: that the lantern-bearers were roughly clothed, and that they were armed.

A hundred yards beyond the station the train stopped again; and when it presently began to back slowly the platform watcher understood that it was preparing to take on a lighted coach standing on a siding belonging to the junction railroad. When the coupling was made and the “Flying Plainsman,” with the picked-up car in tow, was once more gathering headway in its eastward flight up the valley of a torrenting mountain river, the big man read the number “04” over the door of the newly added coach. After he had made out the number he coolly put a leg over the barrier railing, brushed the guarding porter aside, and pushed his way through the narrow side corridor of the trailer.

In the rear half of the car the corridor opened into a comfortable working-room fitted with easy-chairs, lounges, and a desk; otherwise, the office in transit of the Nevada Short Line’s general superintendent, Mr. Richard Maxwell. Maxwell was at his desk when the big-bodied intruder shouldered himself into the open compartment, but he sprang up joyfully when he recognized his unannounced visitor.

“Why, Calvin, old man! Where in thunder did you drop from?” he demanded, wringing the hand of greeting in a vain endeavor to match the big man’s crushing grip. “Sit down and tell it out. I thought you’d gone back east over the Transcontinental a full month ago.”

The man whose card named him as a Government chemist picked out the easiest of the lounging-chairs and planted himself comfortably in it.

“Jarred you, did I? That’s nothing; I’ve jarred worse men than you are in my time. Your thinking machinery is all right; I was due to go back a month ago, but I got interested in a little laboratory experiment on the coast and couldn’t tear myself away. How are Mrs. Maxwell and the kiddies?”

“Fine! And I’m hurrying to get home to them. I’ve been out for a week and had begun to think I was never going to get back to the Brewster office again. I’ve been having the busiest little ghost dance you ever heard of during the past few days.”

The big man settled himself still more comfortably in his chair and relighted the cigar, which, being of the dining-car brand, had sulked for a time and then gone dejectedly out.