Here are the books I consulted along with many, but not all, of the websites I visited. I encourage you to read more about the fascinating history of the pirates of the Ohio River.
The Springhouse. Vol 2. No. 4. July/August 1985. [Contains a fascinating article by the descendent of one of the Harpe’s wives.]
The Outlaws of Cave-in-Rock. Otto Rothert [Considered by many the authoritative book on the subject.]
“Frontier serial killers: the Harpes.” Jon Musgrave. Oct. 23, 1998. American Weekend. [A great summary]
Legends of the War of Independence. T. Marshall Smith. 1855. [This gives a lot of information about the Harpe’s early lives and why it might have contributed to their mental state.]
Letters from the West. James Hall [a Shawneetown judge]. 1828. [for more about the capture and arrest of the Harpes]
“Sam Mason: Two Accounts.” The Springhouse. Vol. 10 No. 3. June 1993.
Captains of the Wilderness. Carl Baldwin
The Story of John Newton’s “Amazing Grace” http://www.reformedreader.org/rbb/newton/amazingrace.htm
http://www.southernmostillinoishistory.net/flatboats1.html (for a photo of flatboat remains recently discovered.)
THE PIRATES AND OTHER OUTLAWS
LIFE IN THE 1800S
LAW AND DISORDER
Modern Day Outlaws of Cave-in-Rock: