The Enlightenment was an age of endeavours. From Johnson’s Dictionary to campaigns for liberty to schemes for measuring the dimensions of the solar system, Britain was consumed by the impulse for grand projects, undertaken at speed. ‘Endeavour’ was also the name given to a Whitby collier bought by the Royal Navy in 1768 for an expedition to the South Seas. A commonplace, coal-carrying vessel, no one could have guessed that Endeavour would go on to become the most significant ship in the history of British exploration. Endeavour famously carried James Cook on his first great voyage, visiting Pacific islands unknown to European geography, charting for the first time New Zealand and the eastern coast of Australia and almost foundering on the Great Barrier Reef. But Endeavour has a secret history too.