An opium den in London's East End with men lying on wooden bunks as a smoker enters. Wood-engraving, c. 1880, after J. C. Dollman.

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An opium den in London's East End with men lying on wooden bunks as a smoker enters. Wood-engraving, c. 1880, after J. C. Dollman. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.