4.50 From Paddington, Agatha ChristieIn this exclusive authorized edition from the Queen of Mystery, a woman in one train witnesses a murder occurring in another passing oneand only Miss Marple believes her story. For an instant the two trains ran side by side. In that frozen moment, Elspeth McGillicuddy stared helplessly out of her carriage window as a man tightened his grip around a woman's throat. The body crumpled. Then the other train drew away. But who, apart from Mrs.