https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14011458
The distinguished men of science 1807-8: a key to the identities of the sitters. Photograph of engraving by W. Walker, 1862, after Sir J. Gilbert.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use