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'Rare' Sir Isaac Newton work found on bookshelf sells for £22k

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image copyrightDominic Winter Auctioneers
image captionThe "rare" volumes were found languishing on a bookshelf in a house in South Wales, during a lockdown clear out

A first edition copy of Sir Isaac Newton's Mathematical Principles of Natural Philosophy in English has sold at auction for £22,000.

The "rare" volumes were found on a bookshelf in a house in South Wales during a lockdown clear out.

Auctioneer, Chris Albury said he "almost fell off" his chair when he realised it was "the greatest work of science in the English language".

He said: "It wasn't the best copy in the world but it was complete."

The book was sold to a buyer in New York and exceeded the £15,000 to £20,000 guide price.

image copyrightDominic Winter Auctioneers
image captionAuctioneer Chris Albury said it was "very hard to say" how many of the 1729 first edition in English were in existence but it was "rare".

Newton's Mathematical Principles of Natural Philosophy is generally described as the greatest work in the history of science.

In it the physicist explains how objects move and lays the foundations of his theory of gravity.

Mr Albury, from Dominic Winter Auctioneers in Cirencester, said it was "very hard to say" how many of the 1729 first edition in English were in existence but it was "rare".

"The print run must have been in the mid to high hundreds," he said.

"Obviously a lot are in institutions now so they don't turn up for auction anywhere in the world very often."

image copyrightGetty Images
image captionSir Isaac Newton's Mathematical Principles of Natural Philosophy is generally described as the greatest work in the history of science.

He said the "lucky seller" was "jumping around and punching the air" when they found out they had hit the "jackpot".

"It was on their shelves and they were looking for things to sell while they were in lockdown." he said.

"It's two volumes and if there's one page missing, it all goes out the window so they came and watched me collate it and spent 40 nervous minutes until I closed the second volume and said it's complete and worth £15k."

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