An Essay on Demonology

This essay examines beliefs about demons, demonic influence, and supernatural causation, likely from a historical or theological perspective. It is significant as part of the long scholarly engagement with demonology, and readers will find discussion of traditions, cases, and ideas about evil spirits.

James Thacher (1754–1844) was an American physician and author best known for historical and medical writing, including accounts of the Revolutionary War. He is not generally considered an esoteric or occult writer, though his works sometimes appear in broad religious or philosophical collections.