You can use this work for any purpose, including commercial uses, without restriction under copyright law. You should also provide attribution to the original work, source and licence.
Creative Commons Attribution (CC BY 4.0) terms and conditions https://creativecommons.org/licenses/by/4.0
'An obese doctor acknowledging the favours of a French chef in his kitchen; denoting their complicity, the chef's food providing patients. Coloured etching by C. Williams, c. 1815.' . Credit: Wellcome Collection. CC BY