Excellent! Jane Eyre couldn't have pulled off the "dear reader" motif any better /g/. It's such an IC-McGonagall touch and is a perfect way to separate the wiser, older narrator from from the smart-but-naive girl. I love --
--the clever canon-compliance --the inspired idea of wizard wartime evacuation --the photos --the many layers you add to the notion of "flight" (love that summary!) --your subtle, nuanced characterizations, especially your Minerva and Rolanda (and Myrtle, and Walburga, and . . .) --Amelia/Jocunda --the deft way you handle the political dimensions, saying all sorts of thoughtful things about ethnicity and nationalism and and sexuality and gender -- and managing to do it without ever hitting us like the proverbial Bludger.
I'm not sure I quite buy the idea that broom-flying wouldn't require magic, but if it could work that way, then I want to know how it's done! We could all give it a try.