Nevil Maskelyne (1732-1811) was a hugely significant figure in the worlds of British science and maritime exploration. His high international standing and wide influence have in many ways been unfairly overlooked, as his story has come to be dominated by his role in the campaign waged by John Harrison, the clockmaker, for a larger reward for his pioneering marine timekeepers. Maskelyne was, however, involved in all the key projects of 18th-century...