From the cab of Engine No. 32, the driver of the Denver Express saw, showing faintly in the early morning, the buildings grouped about the little station ten miles ahead, where breakfast awaited his passengers. He looked at his watch; he had just twenty minutes in which to run the distance, as he had run it often before. Something, however, traveled faster than he. From the smoky station out of which the train passed the night before, along the slender wire stretched on rough poles at the side of the track, a spark of that mysterious something which we call electricity flashed at the moment he returned the watch to his pocket; and in five minutes' time the station-master came out on the platform, a little more thoughtful than his wont, and looked eastward for the smoke of the train. With but three of the passengers in that train has this tale especially to do, and they were all in the new and comfortable Pullman "City of Cheyenne." One was a tall, well-made man of about thirty--blond, blue-eyed, bearded, straight, sinewy, alert. Of all in the train he seemed the most thoroughly at home, and the respectful greeting of the conductor, as he passed through the car, marked him as an officer of the road. Such was he--Henry Sinclair, assistant engineer, quite famed on the line, high in favor with the directors, and a rising man in all ways. It was known on the road that he was expected in Denver, and there were rumors that he was to organize the parties for the survey of an important "extension." Beside him sat his pretty young wife. She was a New Yorker--one could tell at first glance--from the feather of her little bonnet, matching the gray traveling dress, to the tips of her dainty boots; and one, too, at whom old Fifth Avenue promenaders would have turned to look. She had a charming figure, brown hair, hazel eyes, and an expression at once kind, intelligent, and spirited. She had cheerfully left a luxurious home to follow the young engineer's fortunes; and it was well known that those fortunes had been materially advanced by her tact and cleverness. The third passenger in question had just been in conversation with Sinclair and the latter was telling his wife of their curious meeting. Entering the toilet-room at the rear of the car, he said, he had begun his ablutions by the side of another man, and it was as they were sluicing their faces with water that he heard the cry: "Why, Major, is that you? Just to think of meeting you here!" A man of about tweny-eight years of age, slight, muscular, wiry, had seized his wet hand and was wringing it. He had black eyes, keen and bright, swarthy complexion, black hair and mustache. A keen observer might have seen about him some signs of a _jeunesse orageuse_, but his manner was frank and pleasing. Sinclair looked him in the face, puzzled for a moment. "Don't you remember Foster?" asked the man.