Interesting phenomenon, cursed by attention from writers on the paranormal. A pretty good treatment is The Entrancing Flame (1996) by retired policeman John E.

Interesting phenomenon, cursed by attention from writers on the paranormal. A pretty good treatment is The Entrancing Flame (1996) by retired policeman John E. Heymer. He starts with a case that he personally investigated. As I recall, he has doubts about the wick theory.