‘Another example,’ he said. ‘Some years ago you had a very serious delusion indeed. You believed that three men, three one-time Party members named Jones, Aaronson and Rutherford – men who were executed for treachery and sabotage after making the fullest possible confession – were not guilty of the crimes they were charged with. You believed that you had seen unmistakable documentary evidence proving that their confessions were false. There was a certain photograph about which you had a hallucination. You believed that you had actually held it in your hands. It was a photograph something like this.’