https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13997024Edit ImageSaveSaveEditCropCustom TextWilliam Worrell Mayo. Photogravure with line engraving.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 970 x 1200 px | 300 dpiLarge JPEG 2400 x 2969 px | 300 dpiFree DownloadWilliam Worrell Mayo. Photogravure with line engraving.More