Mathematicians and astronomers: twenty portraits. Engraving by J.W. Cook, 1825. https://www.rawpixel.com/image/13989355/mathematicians-and-astronomers-twenty-portraits-engraving-jw-cook-1825Free Image from public domain licenseFame, with a lamp, hovering among clouds over the earth: around her are seven portraits of philosophers in ovals. Engraving… https://www.rawpixel.com/image/14009226/image-clouds-cartoon-faceFree Image from public domain licenseEdmund Halley. Line engraving by A. Birrell, 1795, after R. Phillips. https://www.rawpixel.com/image/14019955/edmund-halley-line-engraving-birrell-1795-after-phillipsFree Image from public domain licenseEdmund Halley. Mezzotint by J. Faber, 1722, after T. Murray, 1712. https://www.rawpixel.com/image/14011421/edmund-halley-mezzotint-faber-1722-after-murray-1712Free Image from public domain licenseEdmund Halley. Line engraving after G. White after Sir G. Kneller. https://www.rawpixel.com/image/13986120/edmund-halley-line-engraving-after-white-after-sir-knellerFree Image from public domain licenseEdmund Halley. Line engraving by A. Birrell, 1795, after R. Phillips. https://www.rawpixel.com/image/14019562/edmund-halley-line-engraving-birrell-1795-after-phillipsFree Image from public domain licenseEdmund Halley. Line engraving by G. Vertue after R. Phillips. https://www.rawpixel.com/image/13972184/edmund-halley-line-engraving-vertue-after-phillipsFree Image from public domain license