Yeah, there are twelve "houses" that the 28 fall into. And that isn't the source of the shikigami either, which I thought rather unfair. They seem to come more out of some of the accumulated legends of the four (or five counting the center) quarters, only... elaborated. And with some other stuff tossed in. That's the point in the search I'm at now, trying to find the other stuff. It's all amazingly more complicated than you can see from the commonly translated stuff. Par for the course. *wry*