Caligula+Elizabethan England = best combo ever. Actually, it sounds a lot like my coursework. XD

Oh yeah, I have a weakness for that myself, but the plausibility on that particular plot is indeed miniscule. Especially since Aziraphale has no reason to fear Hastur and Ligur at all. I have a funny feeling that he'd be awfully amused if they came by to threaten him.