Lucy and Polly, check. The Mary/Eustace relationship, check. Asim to a Pevensie, check. Edmund to my boyfriend, Tom, check.

And you've just suggested another idea. NO NO NO! And I'm not sure I could invent that formal style of writing. I'm finding that a lot of the letters sound the same, actually. which is odd, since I think my characters tend to have pretty distinct povs.... Hmmmmm