Michel Boai, a "chin performer" (on the guitar?), performing with his associates, his wife playing the guitar and M. Engels playing the violin. Coloured lithograph, ca. 1830.

Licence: Public Domain Mark

Credit: Michel Boai, a "chin performer" (on the guitar?), performing with his associates, his wife playing the guitar and M. Engels playing the violin. Coloured lithograph, ca. 1830. Wellcome Collection. Source: Wellcome Collection.