OMAKE to Summer Nights

At the end of Chapter 2, Harry, Hermione, the Drs Granger, and the mysterious uncle are nastily disrespected by the Detective Constable who responded to the police call. If "Mr. Arthur Williams" is more than he seems, a nasty rebuke is likely to "roll downhill" as such things are inclined to do. If you haven't read "Summer Nights" by LeQuin, do so first.