A big thank you to Ron Schildknecht, who was a huge help by providing not just a great interview, but many interesting materials, as well. You can find his website here: https://ronschildknecht.com/
His film is on YouTube and is linked here: https://www.youtube.com/watch?v=oMSoR7eLdAo&t=2s
The rest of my sources are here:
Blake, William. “The Lamb.” Songs of Innocence and of Experience, 1789. https://www.poetryfoundation.org/poems/43670/the-lamb-56d222765a3e1
The Courier-Journal. https://www.courier-journal.com/
Dickey, James L. “The Sheep Child.” Atlantic Monthly, 1966. https://www.poetryfoundation.org/poems/42713/the-sheep-child
Ellis, Bill. “Satanic Ritual Abuse and Legend Ostension.” Journal of Psychology and Theology, 1 Sept. 1992. https://doi.org/10.1177/009164719202000324
Hufford, David J. “Beings Without Bodies: An Experience-Centered Theory of the Belief in Spirits.” Out of the Ordinary: Folklore and the Supernatural, edited by Barbara Walker, University Press of Colorado, 1995. https://www.jstor.org/stable/j.ctt46nwn8.6
Hummel, Maria. “James Dickey: ‘The Sheep Child.'” Poetry Foundation, 27 Aug. 2007. https://www.poetryfoundation.org/articles/68914/james-dickey-the-sheep-child
Sims, Martha C. and Martine Stephens. Living Folklore: An Introduction to the Study of People and Their Traditions. Utah State University Press, 2005.
Stottman, Richard. “Legends of the deadly Pope Lick Trestle: deaths & injuries from real monsters.” Beargrass Thunder, 27 Oct. 2019. Updated 21 Nov. 2020. https://www.beargrassthunder.com/post/legend-of-the-pope-lick-trestle
Wikipedia contributors. “Pope Lick Monster.” Wikipedia, the Free Encyclopedia, 3 Mar. 2021. https://en.wikipedia.org/wiki/Pope_Lick_Monster