https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13979623Edit ImageSaveSaveEditCropCustom TextDavid Gregory. Stipple engraving by E. Harding, 1798.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 935 x 1200 px | 300 dpiLarge JPEG 2400 x 3081 px | 300 dpiFree DownloadDavid Gregory. Stipple engraving by E. Harding, 1798.More