Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
You can use this work for any purpose, as long as it is not primarily intended for or directed to commercial advantage or monetary compensation. You should also provide attribution to the original work, source and licence. Read more about this licence.
Credit
Doctor Botherum, an itinerant medicine vendor (perhaps based on Doctor Bossy) selling his wares on stage with the aid of assistants to a raucous crowd. Coloured etching by T. Rowlandson, 1800. Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). Source: Wellcome Collection.