This she handed to Poirot, murmuring as she did so the cryptic words: "On top of the wardrobe." Then she hurriedly left the room. 
She liked giving riddles to Poirot.
mnli hypothesis: She liked giving riddles to Poirot. premise: This she handed to Poirot, murmuring as she did so the cryptic words: "On top of the wardrobe." Then she hurriedly left the room. 