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A page from Pietro Borgo’s Aritmetica mercantile, printed in Venice in 1484 by Erhard Ratdolt, which is estimated at £40,000-50,000 at Sotheby’s on September 18-19.

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The inaugural sale in the new, purpose-built gallery in the Aeolian Hall, Bloomfield Place, it “…ranges from medieval and Renaissance works on arithmetic, finger-reckoning and the abacus, to the birth in the 20th century of theoretical and practical computer science under Alan Turing”, according to Sotheby’s.

Illustrated above is a page from Pietro Borgo’s Aritmetica mercantile, printed in Venice in 1484 by Erhard Ratdolt, estimated at £40,000-50,000.

sothebys.com