 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. Lanfierre's job was to ferret out aberration. He came to see that genuine quirks were rare and, as time went on, due partly to his own small efforts, rarer. 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