My daytime chain is affixed to a metal spike in the centre of the room that’s secured to what I assume to be a joist under the floorboards. It stretches exactly the same distance in both directions, to the window and to the door on the opposite wall. I suppose that’s why she doesn’t lock my bedroom door. She knows I’m not going anywhere. The second chain is only used when I join her for dinner, every second evening. It reaches down the staircase, along a first-floor landing and into the dining room. It also allows