 Who would want to fix the mistake made in the story?
In the ensuing contretemps they emptied his rear pants pockets, got his wristwatch and restored the contents of the handkerchief pocket. It was this rather than skill that enabled the police to maintain such a tight surveillance on him, a surveillance that went to the extent of getting his fingerprints off the postman's bag, and which photographed, X-rayed and chemically analyzed the contents of his pockets before returning them. By the time Fownes reached his front door an entire dossier complete with photographs had been prepared and was being read by two men in an orange patrol car parked down the street. Lanfierre's job was to ferret out aberration. Conformity had become more than a social force; it was a physical necessity. He came to see that genuine quirks were rare and, as time went on, due partly to his own small efforts, rarer. He had even contrived to engage him in conversation once, a pleasantly absurd, irrational little chat that titillated him for weeks. It was only with the greatest reluctance that he finally mentioned Fownes to MacBride. After years of searching for differences Lanfierre had seen how extraordinarily repetitious people were, echoes really, dimly resounding echoes, each believing itself whole and separate. "It's like this, MacBride. And if there was a house sitting on such a mountain and if winds did blow, it would shake exactly the way that one does. It expressed his weariness and distaste for people who went off and got neurotic when they could be enjoying a happy, normal existence.
 Lanfierre would listen to MacBride in Humphrey's house
 MacBride wouldn't go into the house with Lanfierre  Humphrey would not create the wind maker in his house  Lanfierre would listen to MacBride in Humphrey's house  Agnes wouldn't give Humphrey a condition for marriage