 What is Lanfierre's profession?
He was strolling along a quiet residential avenue: small private houses, one after another, a place of little traffic and minimum distractions. But he was thinking about weather, which was an unusual subject to begin with for a person living in a domed city. He was thinking about Optimum Dome Conditions (a crisp 59 degrees, a mildly dessicated 47%) when a bogus postman, who pretended to be reading a postal card, jostled him. The sidewalk was wide enough to allow four people to pass at one time. In the ensuing contretemps they emptied his rear pants pockets, got his wristwatch and restored the contents of the handkerchief pocket. It all went off very smoothly, like a game of put and take—the sole difference being that Humphrey Fownes had no idea he was playing. Dome weevils, their metal arms reaching out with molten glass, roamed the huge casserole, ceaselessly patching and repairing. Humphrey Fownes strode through the puffs of falling glass still intrigued by a temperature that was always 59 degrees, by a humidity that was always 47%, by weather that was always Optimum. 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. And, after years of working at it, Lanfierre had become an admirer of eccentricity. He came to see that genuine quirks were rare and, as time went on, due partly to his own small efforts, rarer. Fownes was a masterpiece of queerness. Lanfierre was almost proud of Humphrey Fownes.
 He reports instances of divergence from Dome policy
 He ensnares and imprisons rogue citizens in the Dome  He has no job -- he is a criminal from the Movement  He reports instances of divergence from Dome policy  He trafficks humans from the outside world into the Dome