World War One: a large snake, symbolic of a gas attack, strikes at a sleeping soldier. Colour halftone after a crayon drawing by L. Raemaekers.

Licence: Public Domain Mark

Credit: World War One: a large snake, symbolic of a gas attack, strikes at a sleeping soldier. Colour halftone after a crayon drawing by L. Raemaekers. Wellcome Collection. Source: Wellcome Collection.