Frank Humphris Book order (chronological)

This tale of American frontier life is set in the period when the French and the British fought for control of the continent and while native American tribes still had considerable power and influence. En route to their father's fort, Cora and Alice Munro are betrayed by their Iroquois guide. Their companion Duncan Heyward enlists the support of the scout Hawkeye and his friends, who attempt to rescue the party.

The Story of the Indians of the Western Plains [Ladybird Series 707, number 3]