Lightly, and uncertainly warded owl to Crowley, warded to turn into an old book for anyone else.
My dear Crowley,
I have returned. Oh, my - that sounds rather needlessly messianic. Anyway, I've been unpopped. My digs in Hufflepuff have not been altered, although my memory has. I did find my wand, though. Other than that, I've no idea what's been going on, or much of what happened from before being transmogrified into a snack treat.
Can we meet?
Yours,
Aziraphale