African American Civil War Memorial and Museum, Washington, DC

History Channel: How a Black Spy Infiltrated the Confederate White House, Jan 21, 2020

Central Intelligence Agency.  “Black Dispatches:  Black American Contributions to Union Intelligence During the Civil War.”  Accessed 1-2016.  https://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/books-and-monographs/black-dispatches/index.html

Central Intelligence Agency. Intelligence in the Civil War.  Public Affairs, Central Intelligence Agency:  Washington, D.C., 2007.  https://www.cia.gov/library/publications/intelligence-history/civil-war/Intel_in_the_CW1.pdf

CWSAC Battle Summaries:  Hampton Roads.  The American Battlefield Protection Program.  Accessed 1-2016. http://www.nps.gov/abpp/battles/va008.htm

NOAA. Battle of Hampton Roads.  USS Monitor:  Preserving a Legacy.  National Ocean Service. Accessed January 2016.  http://monitor.noaa.gov/150th/hampton.html