Two unique voyages, three ponderous books of scientific probings: what more can Heyerdahl do? He can continue to produce entertaining books.

Fatu-Hiva is of the same quality as his three popular classics, The Kon-Tiki Expedition, The Ra Expeditions and Aku-Aku. But it appears to be a reissue (for the first time in English) of a 1938 Oslo publication, and retains some inevitable naivety….

It was on Fatu-Hiva, the first Polynesian island seen by Europeans nearly 400 years ago, that Heyerdahl came to believe in the likelihood of Polynesia being inhabited from the direction of America. His search for links with ancient South America is indefatigable, but may still leave gaps (fairly, he has always acknowledged a shortage of linguistic affinities).

In Fatu-Hiva he is graphic and forceful throughout. It is not surprising to anyone having experiences of life close to nature, even as it is in the South Seas, that...