So it happened that, when freight No. 15 pulled slowly and heavily out from the Arden siding, Arthur and Uncle Phin and Rusty, instead of being left behind on the storm-beaten platform, were comfortably seated about the little round stove in the caboose, enjoying its grateful warmth and very happy over their good fortune.

Soon after starting, Conductor Tobin and Brakeman Joe entered the caboose, and sat down for a chat with their guests. Uncle Phin was too fully occupied in nursing his bruised knee to enter very heartily into the conversation; but Arthur so easily sustained his share of it, that the trainmen were delighted with his intelligence and ready wit. After he had told them all that he could about himself, he began to ask them questions, whereby he gained much information concerning railroad business in general, and the running of trains in particular. They allowed him to climb up into the cupola of the caboose, through the four windows of which he could look out into the night, ahead, behind, and on both sides. Then they showed him their red and white lanterns, and set of flags, and explained their uses. He thus learned that, if any accident happened to their train, it would be the conductor’s first duty to send a brakeman back on the track to wave a red lantern, and warn approaching trains of the danger ahead.

“Would a train always stop if a red lantern was waved across the track ahead of it?” asked Arthur.

“Of course it would,” was the answer, “for if it didn’t it would get into trouble.”

Brakeman Joe even went so far as to initiate the boy into the mysteries of his own peculiar department. Of course he did not invite him to walk over the wet roofs of the moving train, in order to show him how the brakes of the freight cars were set up; but he gave him a lesson on the platform of the caboose that answered every purpose.

Then the trainmen brought out their tin lunch pails, and from their contents, together with those of the paper bag so thoughtfully provided by Aunt Charity, the merry party of five, for of course the always-hungry Rusty was included in it, made a hearty midnight supper.

Freight No. 15 had stopped several times to drop or pick up loaded cars; but, as yet, nothing had been said about leaving the guests behind, or about Arthur reading a story in payment for the earlier portion of their ride. At length, when they were toiling slowly up a long, heavy grade, for they were now climbing the western slope of the Alleghany Mountains, Conductor Tobin claimed the fulfilment of this promise, and Arthur willingly undertook to read the story of “The Wild Swans.” Brakeman Joe was at his post in the cupola on look-out, so of course he could not be expected to listen to the reading. Nor could the conductor hear very well, above the roar of the train, though the boy strove to read loudly and clearly. At length, as it was evident that he was straining his voice, and also that he was growing very sleepy, kind-hearted Conductor Tobin gently took the book from his hands, and bade him lie down on a sort of long bench, covered with a cushion and a blanket, that ran along one side of the caboose, while he finished the story for himself.

Here, with Rusty nestled close beside him, the tired boy quickly fell asleep, while Uncle Phin nodded and dozed in a big arm-chair beside the stove, and the only sounds heard were the panting of the locomotive, and the rattle of the heavy train as it toiled slowly up the steep grades.

Somewhere near the summit a stop was made for water. During it both Conductor Tobin and Brakeman Joe went to the forward end of the long train for a chat with the engineer. They were still talking when it was time to start ahead, and both men jumped into the cab for a moment that they might finish what they were saying. Then they began to make their way back toward the caboose, walking as quickly and surely over the swaying roofs of the cars as though they had been on solid ground.

It had ceased to rain; but thick, damp mist clouds, were driving over the mountains, and they at first thought this was the reason why they did not see the green lights, that should show in the back of the red caboose lanterns. Then they became anxious, and quickened their steps. When they reached the end of the train their worst fears were realized. The caboose was no longer there.