https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14002953
A dowager commenting on a doctor's youth and perhaps inexperience, he retorts that he is learning on children. Wood engraving by G. Wallis-Mills, 1908.
Original public domain image from Wellcome Collection
Public DomainFree CC0 image for Personal and Business use