People harvesting a field of corn: one of the harvesters appeals to a mounted overseer, who disregards his plea and indicates the work. Etching by G. Giampiccoli after M. Ricci.

Licence: Public Domain Mark

Credit: People harvesting a field of corn: one of the harvesters appeals to a mounted overseer, who disregards his plea and indicates the work. Etching by G. Giampiccoli after M. Ricci. Wellcome Collection. Source: Wellcome Collection.