A glum Frenchman: he has plenty of 'buttons' (French boutons, i.e. moles, nodules or naevi) on his face, but lacks them on his trousers. Coloured pen and ink drawing by Tirvert.

Licence: Public Domain Mark

Credit: A glum Frenchman: he has plenty of 'buttons' (French boutons, i.e. moles, nodules or naevi) on his face, but lacks them on his trousers. Coloured pen and ink drawing by Tirvert. Wellcome Collection. Source: Wellcome Collection.