Smiling girl and man from Darwin's Expression of Emotions...
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Plate 3. Heliotype plate from Chapter Vlll Joy, High Spirits, Love, Tender Feelings, Devotion. Figs 1-3 show degrees of laughter and smiling, fig 2 is by Dr Wallich and figs 1 and 3 by Mr Rejlander. Figs 4, 5 and 6 are by Dr Duchenne
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