Do you know that moment when you paint a landscape as a child and, when you're maybe under seven or something, the sky is just a blue stripe across the top of the paper? And then there's that somewhat disappointing moment when the teacher tells you that the sky actually comes down in amongst all the branches. And it's like life changes at that moment and becomes much more complicated and a little bit more boring, as it's rather tedious to fill in the branches.
Three children have become adults since a phone call with Jo Rowling, containing one small clue, persuaded me that there was more to Snape than an unchanging costume, and that even though only three of the books were out at that time, she held the entire massive but delicate narrative in the surest of hands.
I never talk about 'Harry Potter' because I think that would rob children of something that's private to them. I think too many things get explained, so I hate talking about it.