Trade card of James Mann, optician, Ludgate Hill, London, c1707-1751.
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The opticians at 'The Sign of Isaac Newton and Two Pair of Golden Spectacles' sold a range of optical toys and instruments, barometers, thermometers and telescopes as well as spectacles. Mann worked in partnership with James Ayscough as Mann and Ayscough, 1743-1747. He is also known to have had premises in Fleet Street in 1735.