“Since Lennon’s death, she has been hounded for exploiting his memory; just last week she was castigated for including Lennon’s blood-stained clothes in a New York exhibition, a decision she justifies as a work of political art. […] Even at the height of her grief, she went on with her work … ‘[B]ut nobody really noticed,’ she says without rancour. ‘I was like a prisoner drawing on the walls or someone doing cave paintings. I was laying things for the future, for the next prisoner who might notice it.'”