Plus there is a lot of conflicting information in the original sources as well.

Best bet is to figure out what you want them to do and how they fit into your world.

Warlock
Web Warlock, web.warlock@comcast.net
Ghosts of Albion website and the Ghosts of Albion Discussion Group
Jeanne-Antoinette Poisson: What do mosters have nightmares about?
The Doctor: Me!
- Doctor Who: The Girl in the Fireplace