chunk: Finding an abandoned boxcar, the children start a new life of independence. Henry ends up working various odd jobs in a nearby town (Intervale in the 1924 edition; Silver City in later editions) for a young doctor (Dr. McAllister in the 1924 edition; Dr. Moore in later editions), in order to earn money for food and other materials they need. He also does gardening for the doctor's mother. The children's lives are pleasant and full of hard work until Violet becomes ill and they go to the doctor for assistance.
  Unbeknownst to the children, by that time the doctor knows very well who they are and where they are living; indeed, he has been keeping a discreet eye on them for weeks. Their grandfather, who lives nearby, has been advertising in the papers, offering a reward for news of them, but the doctor hasn't wanted to spoil the children's fun by informing on them. When Violet becomes ill, however, he feels it is time to do so.