Six faces expressing the human passions: (clockwise from top left) scorn, laughter, acute pain, desire, anger, sadness. Coloured etching, c. 1800, after C. Le Brun.

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Six faces expressing the human passions: (clockwise from top left) scorn, laughter, acute pain, desire, anger, sadness. Coloured etching, c. 1800, after C. Le Brun. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.