Give a reader a hallway with one door slightly ajar and a light on behind it, and you can stop writing for a moment, because they have already started without you. By the time I get around to describing what is in the room, they have furnished it with something worse than I could manage, drawn from their own private catalogue of unease. That arrangement sits at the centre of writing dread, and it explains why I think of gore as an expensive way to end the conversation early.