LOUIS L’AMOUR “Unguarded Moment.” First appeared in Popular Detective, March 1952. Collected in The Hills of Homicide (Bantam, paperback, 1983).

   The first paragraph caught my attention:

   Arthur Fordyce had never done a criminal thing in his life, nor had the idea of doing anything unlawful ever seriously occurred to him.

   The second really had me sitting up and taking notice:

   The wallet that lay beside his chair was not only full; it was literally stuffed. It lay on the floor near his feet where it had fallen.

   And the third had me hooked all the way:

   His action was as purely automatic as an action can be. He let his Racing Form slip from his lap and cover the billfold. Then he sat very still, his heart pounding. The fat man who had dropped the wallet was talking to a friend on the far side of the box. As far as Fordyce could see, his own action had gone unobserved.

   But of course he was seen, and therein lies the story. It continues with some petty blackmail, an accidental death, the dead man’s girl friend who wants to …

   This is Cornell Woolrich territory, maybe with clearer and simpler language, but pure noir from beginning to end.