An écorché face weeping, showing the muscles involved. Stipple engraving by H. Singleton after G.T. Stubbs after G. Stubbs… https://www.rawpixel.com/image/13973479/image-paper-cartoon-faceFree Image from public domain licenseHeads. Representing the various passions of the soul; as they are expressed in the human countenance / [Charles Le Brun]. https://www.rawpixel.com/image/13999941/image-paper-cartoon-faceFree Image from public domain licenseAn écorché face weeping, showing the muscles involved. Stipple engraving by H. Singleton after G.T. Stubbs after G. Stubbs… https://www.rawpixel.com/image/14001580/image-cartoon-face-personFree Image from public domain licenseAn écorché face showing the movements of facial muscles during laughter. Stipple engraving by H. Singleton after G.T.… https://www.rawpixel.com/image/13972854/image-paper-cartoon-faceFree Image from public domain licenseAn écorché face showing the state of the facial muscles during relaxation. Stipple engraving by H. Singleton after G.T.… https://www.rawpixel.com/image/13994519/image-cartoon-face-personFree Image from public domain license