https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13975368Edit ImageSaveSaveEditCropCustom TextSir John Frederick William Herschel. Stipple engraving by D. J. Pound, 1862, after J. Mayall.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 836 x 1200 px | 300 dpiLarge JPEG 2306 x 3311 px | 300 dpiFree DownloadSir John Frederick William Herschel. Stipple engraving by D. J. Pound, 1862, after J. Mayall.More