In that moment I thought of Broken Harbor: of my summer haven, awash with the curves of water and the loops of seabirds and the long falls of silver-gold light through sweet air; of muck and craters and raw-edged walls where human beings had beat their retreat. For the first time in my life, I saw the place for what it was: lethal, shaped and honed for destruction as expertly as the trap lurking in the Spains’ attic. The menace of it left me blinded, sang like hornets in the bones of my skull. We need straight lines to keep us safe, we need walls; we build solid concrete boxes, signposts, packed skylines, because we need them. Without any of that to hold them down, Pat’s mind and Jenny’s had flown wild, zigzagging in unmapped space, tied to nothing.

Jenny said, “The worst part was talking to Fi. We always talked every morning; if I’d stopped, she’d have known something was wrong. But it was so hard. There was so much stuff to remember—like I had to make sure Jack was out in the garden or up in his room before she called, because I wasn’t about to tell her he wasn’t in preschool, so I couldn’t have her hearing him. And I had to try and remember what I’d said to her before—for a while I used to take notes while we talked, so I could have them there the next day and make sure I got it right, but I got paranoid about Pat or the kids finding them and wanting to know what the story was. And I had to sound cheerful all the time, even if Pat was conked out on the sofa because he’d been sitting there till five in the morning staring at a hole in the bloody wall. It was awful. It got …”

She swiped a tear off her face, absently, like someone batting at a fly. “It got to where I woke up dreading that phone call. Isn’t that terrible? My own sister that I love to bits, and I used to daydream about how I could pick some fight bad enough that she’d stop speaking to me. I’d have done it, except I couldn’t concentrate long enough to come up with anything.”

“Mrs. Spain,” I said, louder, putting a snap into my voice. “When did things reach this point?”

After a moment her face turned towards me. “What? … I’m not sure. It felt like I kept on going for ages like that, years, but … I don’t know. September? Sometime in September?”

I braced my feet hard against the floor and said, “Let’s move on to this Monday.”

“Monday,” Jenny said. Her eyes skidded away to the window and for a sinking second I thought I had lost her again, but then she drew a long breath and wiped off another tear. “Yeah. OK.”

Outside the window the light had moved; it fired the whirling leaves with a translucent orange glow, turned them into blazing danger-flags that made my adrenaline leap. Inside the air felt stripped of oxygen, as if the heat and the disinfectants had seared it all away, left the room dried hollow. Everything I was wearing itched fiercely against my skin.