An anonymous man from Guernsey has sold a rare first edition Sir Isaac Newton book for £24,000 at auction.
The copy of Mathematical Principles of Natural Philosophy in English, which was published in 1729, more than doubled its guide price of between £8,000 and £10,000 when it sold at Hansons Auctioneers in Staffordshire. It was bought by a private international phone bidder.
The seller says the book has been in his family’s possession for at least 60 years, having been obtained by his grandfather during the 1950s and left to him when he died in 1980.
It lays down the basics of Newton's theory of gravity and is considered "the most important work in the history of science."