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Our galleries are quietest on weekdays and weekend mornings. At busy times, particularly on Saturdays, you may need to queue for our temporary exhibitions.

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George Bidder, a mental calculator, as a boy. Aquatint by H. Meyer, 1817, after W. Waite.

George Bidder, a mental calculator, aged twelve. Line engraving by S. Springsguth, 1818.

George Bidder, a mental calculator, aged thirteen. Line engraving by J.H. Robinson, 1819, after Miss Hayter.

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Active filters:

George Bidder, a mental calculator, as a boy. Aquatint by H. Meyer, 1817, after W. Waite.

George Bidder, a mental calculator, aged twelve. Line engraving by S. Springsguth, 1818.

George Bidder, a mental calculator, aged thirteen. Line engraving by J.H. Robinson, 1819, after Miss Hayter.