Much had transpired during the long stay at the Yellowstone mine. The railroad, with its busy construction gang and its noisy, short-breathed engine, had reached and passed the little camp and had left behind its steel trail. The tracks were not used for regular traffic as yet, but the little dinky engine went by frequently, dragging flat cars loaded with rails, ties, and other construction material. The boys became great friends of the engineer, and he allowed them to ride with him in the cab of the locomotive occasionally.

War-dance postures.

It was with real regret, therefore, that one morning, as the iron horse stood near the mine, hissing and grunting in impatience to be off, the boys climbed up the step and into the cab to bid their friend Mr. Jackson good-by.

"What! going to pull up stakes?" he inquired. "I've got three boys about your size back in the East at school, where you ought to be," he added.

"Well," John replied, "mother has talked about school, but father says he's going to teach us to work first."

"Father's great on work," interposed Ben.

In answer to Mr. Jackson's inquiry, John said that they were to start in a day or two and would go alone, driving a buckboard; and that though they did not know the road the horses had been over it, so with that aid and the description given they would be able to find the way.

"Well, so long, boys," said the kindly engineer, after they had shaken hands and thanked him for the many engine rides, "I shall miss you."