Gezicht op een water met schepen (1766 - 1824) by Johann Heinrich Troll and David Kleyne https://www.rawpixel.com/image/13760226/image-paper-person-artFree Image from public domain licenseMarie François Pierre Gonthier Maine de Biran. Photogravure by Synnberg Photo-gravure Co., 1898. https://www.rawpixel.com/image/13996295/image-cartoon-face-personFree Image from public domain licenseJohn Bull as the patient of promotors of competing therapies; representing British parliamentary reform. Aquatint by S. de… https://www.rawpixel.com/image/13971398/image-cartoon-face-personFree Image from public domain licenseWilliam Hyde Wollaston. Mezzotint by W. Ward, 1824, after J. Jackson. https://www.rawpixel.com/image/13989548/william-hyde-wollaston-mezzotint-ward-1824-after-jacksonFree Image from public domain license