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220.127.116.11, Fort Federal Hill - Baltimore, MD (2) [black and white], 1861-1865, Box: 1, item: 12. Civil War-Era Pictorial envelopes and song sheets, 0370-MDHC. Special Collections and University Archives. https://archives.lib.umd.edu//repositories/2/archival_objects/320141 Accessed April 22, 2021.