I’m afraid I’ve come more and more to the opinion that Rowling is the kind of author who simply doesn’t think. So to look for an analytical interpretation of anything in the series is probably an exercise in frustration. She paints what is intended as impressive word pictures, essentially vignettes, mainly on the basis of how they are supposed to push your buttons and make you feel, without ever considering how they are supposed to fit together. This sometimes produces a considerable emotional impact, if you are at all sensitive to that kind of jerking around, but it doesn’t necessarily make sense. And sometimes they just plain backfire. Such as when Snape and Yaxley meet in a dark lane, enter through the gate, cross a dark garden, are admitted into a dimly lit entry hall, and are ushered into a sitting room lit by a roaring fire, and then pause for their eyes to adjust *to the “lack of light”* WTF?! Aren't their eyes already attuned to low light?
Several of these issues are still slowly coming into focus. And one of the sharpest is the awareness that the world Rowling assembled is simply a lot bigger than the narrow-focused, smug, anglo-centric view of it she gave us.
Because when you come right down to it, it is clear that she never really intended to build a solid secondary world to put her story in. She simply didn’t do the groundwork. Instead, she has ended up with this weird amalgamation that she threw together — which is highly detailed in some areas, and only vaguely sketched in elsewhere with several great gaping holes where you least expect them, to fall right out of the story through.
But, back when she assembled this pretend world, she used the best possible materials available.
She mined folklore, and classic (written) tales that have been pretty fully absorbed by the culture, as well as ancient myth, and symbolism that has been around for centuries, she mimiced the really traditional “tropes” of how stories are put together and how they work, and she did it with a free hand. But I’m no longer convinced that she did it all consciously. I think she slung a lot of them together because they just felt right together. Sure, sometimes she tweaked them before she deployed them, or renamed them, or trivialized the hell out of them (unicorns are NOT equines, regardless of what you try to tell me. They’re monsters), but she hardly ever invented something new. Most of her elements already existed. The only thing in the Potterverse that is really original are some of her combinations.
Consequently, as I say, she ended up with something that is a lot bigger than she is. And which upon first encounter comes across as a lot more etrudite than she probably really is too, because all of the elements she used came already equipped with their own baggage, and a whole pre-existing collection of associations which all originally led someplace. And most of them are so widely known and/or so universal that even with a 2nd or 3rd-rate education, you are able to recognize them, and are at least somewhat aware of what those particular elements usually mean.
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They want to explore this incomplete world, and have a go at patching some of the holes themselves. Closing off Harry’s story was as welcome as being finally rid of an irritating docent who keeps going on and on about the glories of the accomplishments of one modern splinter group when what you want to do is to examine the base that the splinter group was building upon.