Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
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Credit
Doctor Bossy, an itinerant medicine vendor, selling his wares on stage with the aid of assistants. Coloured etching by W. Birch, 1792, after A. van Assen. Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). Source: Wellcome Collection.