'Who is Colnett?' So asks Jack Aubrey in Patrick O'Brian's Far Side of the World. Who indeed. As an adventurous teenager, James Colnett had sailed with Cook in the Resolution. He later became a pioneer in the Pacific sea otter trade, nearly starting a war with Spain in the process. He attempted to force Japan and Korea to admit British trade, and failing that smuggled pelts into China. He conducted a whaling reconnaissance to the Galapagos...