Dr Richard Price kneeling on a large crown (with a demon on his back) to look through a peep-hole at a group of ruffians… https://www.rawpixel.com/image/13961331/image-cartoon-person-bookFree Image from public domain licenseJohn Bull as a patient, in disarray, reclines on a sofa and receives medical treatment from politicians. Coloured etching by… https://www.rawpixel.com/image/13967751/image-cartoon-face-personFree Image from public domain licenseHydraulics: a suction pump with an elaborate regulator. Engraving, 1754. https://www.rawpixel.com/image/13976840/hydraulics-suction-pump-with-elaborate-regulator-engraving-1754Free Image from public domain license