Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
An itinerant surgeon extracting stones from a man's head; symbolising the expulsion of 'folly' (insanity), in the background is a manic woman who is waiting for the operation. Photogravure, 1926, after T. de Brij after M. de Vos. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.