Licence: Public Domain Mark
Credit: Sir John Graham Kerr. Photograph by T. & R. Annan & Sons Ltd. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/V0026637/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Sir John Graham Kerr. Photograph by T. & R. Annan & Sons Ltd. Wellcome Collection. Source: Wellcome Collection.