内容简介：
The long train, which for nearly an hour had been gliding smoothly forward with a soothing, cradling motion of its heavy trucked Pullmans, and a crooning, lullaby sound of its droning wheels, came to a jarring stop at one of the mountain stations, and Lieutenant Allison wakened with a start. The echo of the laugh that he had heard in his dream still sounded in his ears, a tantalizing, compelling note, elusive as the Pipes of Pan, luring as a will-o'-the-wisp. Above the bustle of departing and incoming passengers, the confusion of the station and the grinding of the wheels as the train started again that haunting peal of laughter still rang in his ears, still held him in its thrall, calling him back into the dream from which he had just awakened. Still heavy with sleep and also somewhat light-headed - for he had been traveling for two days and the strain was beginning to tell on him, although the doctors had at last pronounced him able to make the journey home for a month's furlough - he leaned his head against the cool green plush back-rest and stared idly through half-closed eyelids down the long vista of the Pullman aisle.