He was a quiet man. That's what they always say about the guy who one day picks up an axe and wipes out the whole family. Kees Popinga, the central character of Georges Simenon's The Man Who Watched Trains Go By, is just such a fellow. He's got everything dialed nice and tight. He's obsessed with having constructed a first rate life: a wife, a daughter, a stove, and a house all of the "highest quality." And then in the course of one evening, as Popinga discovers that the company that helped pro