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14 paroxysm of grief when a gust of wind cracked the kitchen window-pane. For hours she was inconsolable, and to me incomprehensible. But when she was able to talk, it transpired that if a windowpane broke it meant that a close relative had died. She was, therefore, mourning for her father, who had frightened her into running away from home. The father was, of course, quite thoroughly alive as a telegraphic inquiry soon proved. But until the telegram came, the cracked glass was an authentic message to that girl. Why it was authentic only a prolonged investigation by a skilled psychiatrist could show. But even the most casual observer could see that the girl, enormously upset by her family troubles, had hallucinated a complete fiction out of one external fact, a remembered superstition, and a turmoil of remorse, and fear and love for her father.

Abnormality in these instances is only a matter of degree. When an Attorney-General, who has been frightened by a bomb exploded on his doorstep, convinces himself by the reading of revolutionary literature that a revolution is to happen on the first of May 1920, we recognize that much the same mechanism is at work. The war, of course, furnished many examples of this pattern: the casual fact, the creative imagination, the will to believe, and out of these three elements, a counterfeit of reality to which there was a violent instinctive response. For it is clear enough that under certain conditions men respond as powerfully to fictions as they do to realities, and that in many cases they help to create the very fictions to which they respond. Let him cast the