Hands showing the alphabet of sign language. Wood engraving. https://www.rawpixel.com/image/14004927/hands-showing-the-alphabet-sign-language-wood-engravingFree Image from public domain licenseAlphabeti verè naturalis Hebraici brevissima delineatio. Quae simul methodum suppeditat, juxta quam qui surdi nati sunt sic… https://www.rawpixel.com/image/13980408/image-paper-cartoon-faceFree Image from public domain license