https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13972553![William Curtis. Stipple engraving by W. Holl.](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9zdGF0aWMvZmlsZXMvd2Vic2l0ZS8yMDI0LTAyL3djYWJ6ZnRnYjMtaW1hZ2UuanBn.jpg)
![William Curtis. Stipple engraving by W. Holl.](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9zdGF0aWMvZmlsZXMvd2Vic2l0ZS8yMDI0LTAyL3djYWJ6ZnRnYjMtaW1hZ2UuanBn.jpg)
William Curtis. Stipple engraving by W. Holl.
William Curtis. Stipple engraving by W. Holl.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use