https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13960196Edit ImageSaveSaveEditCropCustom TextThe General Post Office, St Martin's-le-Grand, London. Wood engraving by [C.R.], [1869].Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 1200 x 881 px | 300 dpiLarge JPEG 3137 x 2303 px | 300 dpiFree DownloadThe General Post Office, St Martin's-le-Grand, London. Wood engraving by [C.R.], [1869].More