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Chapter i. The Door in the Ground
JL H E dim wagon track went no farther on the prairie, and Pa stopped the horses.
When the wagon wheels stopped turning. Jack dropped down in the shade between them. His belly sank on the grass and his front legs stretched out. His nose fitted in the furry hollow. All of him rested, except his ears.
All day long for many, many days. Jack had been trotting under the wagon. He had trotted all the way from the little log house in Indian Territory, across Kansas, across Missouri, across Iowa, and a long way into Minnesota. He had learned to take his rest whenever the wagon stopped.