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1.4.18, Tavern room and post office, the Mary Surratt House, Clinton, Maryland, circa 1973-1990, Box: 4. Institute of American Deltiology Postcard collection, 0007-MDHC. Special Collections and University Archives. https://archives.lib.umd.edu//repositories/2/archival_objects/577466 Accessed April 21, 2021.