https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/14006608Edit ImageSaveSaveEditCropCustom TextSir William John Ritchie Simpson. Photograph by Douglas Scott.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 861 x 1200 px | 300 dpiLarge JPEG 1453 x 2025 px | 300 dpiFree DownloadSir William John Ritchie Simpson. Photograph by Douglas Scott.More