Down the long hills

After the massacre Hardy and Betty Sue were left with only a horse and a knife with which to face the long battle against the wilderness. A seven-year-old boy and a three-year-old girl, stranded on the limitless prairie. They were up against starvation, marauding Indians, savage outlaws, and wild animals. They were mighty stubborn, but the odds were against them--and their luck was about to run out.From the Paperback edition.