| John Thomson Triumphal arch Hong Kong Duke of Edinburgh's visit 1868-1872 (taken) 1981 (print) Photograph Wellcome Collection Wellcome Library no. 18643i, Attribution 4.0 International (CC BY 4.0) LL/97126 This is one of a collection of same-size contact prints made, in 1981, from John Thomson's original negatives. The glass negatives, made between 1868 and 1872, were purchased from Thomson by Sir Henry Wellcome in 1921 and are now in the Wellcome Institute Library
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