Murder in Mesopotamia - Agatha Christie (Hercule Poirot #14)

I am a nurse. But you don’t need any training to recognise a frightened woman.

Mrs. Leidner was just about the most frightened patient I have ever had. But several day passed before she finally unburdened herself. “I have made up my mind to confide in you, nurse. I must tell someone or I shall go mad…”

I waited. At last she said, “I am afraid of being killed!” Well, it was out now. I kept pretty calm because she was near enough hysterical as it was. “Dear me,” I said, “so that’s it, is it…” After all, I’ve had a lot of border-line cases in my time.

How was I to know that she had good reason to be afraid—that soon she would be dead?