https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13968894
Four faces: a European, a Mongolian, an Ethiopian, and a profile of Samuel Johnson; three frontal silhouettes; three skulls of the same races seen from above (in the order European, Ethiopian and Mongolian). Coloured engraving by J. Pass, 1824.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use