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![William Smoult Playfair. Photograph by A. C. Cooper.](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDI0LTAyL2xyL3djcHh1eTdmZTgtaW1hZ2UuanBn.jpg)
William Smoult Playfair. Photograph by A. C. Cooper.
William Smoult Playfair. Photograph by A. C. Cooper.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use