Adam Walker, a natural philosopher, performing scientific experiments. Coloured etching after J. Gillray, 1796. https://www.rawpixel.com/image/13951440/image-cartoon-face-personFree Image from public domain licenseAdam Walker, a natural philosopher, performing scientific experiments. Coloured etching after J. Gillray, 1796. https://www.rawpixel.com/image/13969726/image-cartoon-face-frameFree Image from public domain licenseKaart van het graafschap Vlaanderen (1706 - 1733) by anonymous, Pieter Husson, Pieter Husson and Frederik Thomas van Hangest… https://www.rawpixel.com/image/13777240/image-paper-cartoon-faceFree Image from public domain license