Hauntology

The Hungry Ghosts of Japanese Buddhist folklore are invisible, they eat excrement, causing it to wither away in the street, and their presence brings sickness to the living. Not a bad summary, for a medieval society, of the germ theory of disease.

Maybe the sense of haunting in the atmosphere of abandoned places is a similar sketch of the invisible, unreconciled forces that made it and left it. Abstract Machines in the Plane of Immanence are felt as spooky presences in places that are unmade or becoming. What kind of taxonomy describes the different species and symptoms of these invisble forces?