La Petite Maison dans la prairie, tome 3

The Ingalls family had fared badly in Plum Creek, Minnesota. They were in debt. Mary was blind now. So Pa went West to work at a railroad camp in Dakota Territory where he could make as much as fifty dollars a month! Then he sent for his wife and four children, and they became the first settlers in the new town of De Smet. But the railroad brought hordes of land-hungry people from the East. Had Pa waited too long to file his homestead claim? - Back cover.