https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/9700544Edit ImageSaveSaveEditCropCustom TextUnion prisoner envelope (Oct. 26, 1864) vintage postage. Original public domain image from Smithsonian. Digitally enhanced by rawpixel.Original public domain image from SmithsonianMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGTIFFBanner JPEG 1200 x 800 px | 300 dpiLarge JPEG 3500 x 2333 px | 300 dpiBest Quality JPEG 5049 x 3366 px | 300 dpiBanner TIFF 1200 x 800 px | 300 dpiBest Quality TIFF 5049 x 3366 px | 300 dpi | 97.27 MBFree DownloadUnion prisoner envelope (Oct. 26, 1864) vintage postage. Original public domain image from Smithsonian. Digitally enhanced by rawpixel.More