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Peking, Pechili province, China: a nightwatchman. Photograph, 1981, from a negative by John Thomson, 1869. Wellcome Collection · wellcomecollection.org Visit source

Claudet received the Royal Warrant on the 9th of July 1855. The daguerreotype cannot be any earlier than that (source, '… Europeana · daguerreobase.org Visit source

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Wanshou Bridge, Fuzhou (Foochow), Fukien province, China. Photograph by John Thomson, 1870/1871. Wellcome Collection · wellcomecollection.org Visit source

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Wanshou Bridge, Fuzhou (Foochow), Fukien province, China. Photograph by John Thomson, 1870/1871. Wellcome Collection · wellcomecollection.org Visit source

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Peking, Pechili province, China: a nightwatchman. Photograph, 1981, from a negative by John Thomson, 1869. Wellcome Collection · wellcomecollection.org Visit source

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