“I had a bizarre rapport with this mirror and spent a lot of time gazing into the glass to see who was there. Sometimes it looked like me. At other times, I could see someone similar but different in the reflection. A few times, I caught the switch in mid-stare, my expression re-forming like melting rubber, the creases and features of my face softening or hardening until the mutation was complete. Jekyll to Hyde, or Hyde to Jekyll. I felt my inner core change at the same time. I would feel more confident or less confident; mature or childlike; freezing cold or sticky hot, a state that would drive Mum mad as I escaped to the bathroom where I would remain for two hours scrubbing my skin until it was raw. The change was triggered by different emotions: on hearing a particular piece of music; the sight of my father, the smell of his brand of aftershave. I would pick up a book with the certainty that I had not read it before and hear the words as I read them like an echo inside my head. Like Alice in the Lewis Carroll story, I slipped into the depths of the looking glass and couldn’t be sure if it was me standing there or an impostor, a lookalike.I felt fully awake most of the time, but sometimes while I was awake it felt as if I were dreaming. In this dream state I didn’t feel like me, the real me. I felt numb. My fingers prickled. My eyes in the mirror’s reflection were glazed like the eyes of a mannequin in a shop window, my colour, my shape, but without light or focus. These changes were described by Dr Purvis as mood swings and by Mother as floods, but I knew better. All teenagers are moody when it suits them. My Switches could take place when I was alone, transforming me from a bright sixteen-year-old doing her homework into a sobbing child curled on the bed staring at the wall. The weeping fit would pass and I would drag myself back to the mirror expecting to see a child version of myself. ‘Who are you?’ I’d ask. I could hear the words; it sounded like me but it wasn’t me. I’d watch my lips moving and say it again, ‘Who are you?”