Friedrich Hermann Louis Muzel. Line engraving by D. Berger after A. Graff. https://www.rawpixel.com/image/14016614/friedrich-hermann-louis-muzel-line-engraving-berger-after-graffFree Image from public domain licenseErnst Platner. Line engraving by C.G. Geyser after A. Graff. https://www.rawpixel.com/image/14008761/ernst-platner-line-engraving-cg-geyser-after-graffFree Image from public domain licenseMarc Eliézier Bloch. Stipple engraving by A. Tardieu after A. Graff. https://www.rawpixel.com/image/14002533/marc-eliezier-bloch-stipple-engraving-tardieu-after-graffFree Image from public domain licenseJohann Goercke. Stipple engraving by F. Bolt, 1805, after A. Graff. https://www.rawpixel.com/image/14007803/johann-goercke-stipple-engraving-bolt-1805-after-graffFree Image from public domain licenseJohann Georg Palizsch. Line engraving by C. G. Schulze, 1782, after A. Graff and J.E. Schenau. https://www.rawpixel.com/image/13972630/image-face-frame-personFree Image from public domain licenseJohann Friedrich Meckel the elder. Line engraving by J. Schleuen after A. Graf. https://www.rawpixel.com/image/13999414/johann-friedrich-meckel-the-elder-line-engraving-schleuen-after-grafFree Image from public domain licenseJohann Christoph Friedrich von Schiller, with a reproduction of his signature below. Stipple engraving by J. Halpin after A.… https://www.rawpixel.com/image/13987518/image-paper-face-frameFree Image from public domain license