America's First Serial Killers
Breazeale, J.W.M. Life As It Is; or Matters and Things in General. Knoxville, TN: James Williams, 1842.
Daniels, Jonathan. The Devil's Backbone. Gretna, LA: Pelican Publishing, 1989.
Jenkins, Judy, "Fearsome Twosome had a Reign of Terror in These parts," The Gleaner, March 27, 1988.
Musgrave, Jon. "Frontier Serial Killers: The Harpes," American Weekend, October 23, 1998, illinoishistory.com. Retrieved 6/5/06.
Nash, Jay. Bloodletters and Bad Men.
"Natchez Trace," National Park Service. Nps.gov, retrieved 6/5/06.
Roberts, O. A. Outlaws of Cave-in-Rock.
Schechter, Harold. The Serial Killer Files. New York: Ballantine, 2004.
Sifakis, Carl. The Encyclopedia of American Crime.
The Tennessee Encyclopedia of History and Culture.