Christie, Agatha - 4.50 from Paddington

For a time the trains ran parallel...
Mrs McGillicuddy was able to look into a lighted carriage only a few feet away.  Standing with his back to her was a man.  His hands were around a woman's throat and he was slowly relentlessly, strangling her.  Her eyes were starting from their sockets, her face was purple and congested.  The end came as Mrs McGillicuddy watched.  Then the train accelerated rapidly and vanished from her sight...

Condition:  Fair