<p>For an instant the two trains ran together,side by side. In that frozen moment, Elspeth witnesseda murder. Helplessly, she stared out of hercarriage window as a man remorselessly tightened hisgrip around a woman’s throat. The body crumpled.Then the other train drew away.</p> <p>But who, apart from Miss Marple, would take herstory seriously? After all, there were no suspects,no other witnesses . . . and no corpse.</p> <p>Originally published as What Mrs. McGillicuddy Saw!. </p>