"A book-policing agency," says Aziraphale with simultaneous skepticism and distaste. "Book characters gone rogue." He draws himself up a bit with enough assurance that one might be able to see the principality shining through the absent-minded bookseller. "Crowley isn't the only one who lived through an intended apocalypse. That little debacle involved horsepersons of the apocalypse, the Voice of God, and the Antichrist himself, and yet the world didn't end, did it? Can a jurisfiction agent arrest an angel, do you think?"