https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13981371
William Spottiswoode. Stipple engraving by G. J. Stodart, 1883, after H. Van der Weyde.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use