https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14014827Edit ImageSaveSaveEditCropCustom TextGeorge Birkbeck. Stipple engraving by J. Thomson after W. Derby.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 745 x 1200 px | 300 dpiLarge JPEG 1299 x 2093 px | 300 dpiFree DownloadGeorge Birkbeck. Stipple engraving by J. Thomson after W. Derby.More