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Nature 444, 821 (14 December 2006) | doi:10.1038/444821a; Published online 13 December 2006

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Lisa Jardine1

BOOK REVIEWEDTime Restored: The Harrison Timekeepers and R. T. Gould, the Man Who Knew (Almost) Everything

by Jonathan Betts

Oxford University Press: 2006. 480 pp. £35 $69.50

In her best-selling popular science book Longitude, Dava Sobel told the tale of horologist John Harrison's eighteenth-century quest to design and build a precision timekeeper accurate enough to determine longitude at sea. Towards the end of the book, she introduces us to another 'lone genius' with a lifelong fascination with clocks, Lieutenant Commander Rupert T.