Mm. [A good question, but one he can't answer, even after so much time here. Perhaps there are clues out here in the dark that may help them (or others) gain some insight.

The stuff about the dead though, right up his alley.]

Yes, actually. Many cities have lemures, angry spirits that have been unable to move on. If you've got a haunted house, it's probably one of them. There are also, mm... I guess you'd call them house spirits. Lares. They can be annoying, but they're not vengeful.