III Talking it over

IV The Catwhisker

V A Baffling Situation

VI A Mystery and Cub's "Goat"

VII Returning Cub's "Goat"

VIII Mathematics or Geography?

IX The Radio Diagram

X The Island-Surrounded Island

XI The Deserted Camp

XII Hal's Discovery

XIII "Robinson Crusoe's" Diary

XIV More Light and More Mystery

XV The Hook-up on Shore

XVI Running down a Radio Fake

XVII Bud's Discovery