Hercule Poirot shook his head reflectively. He who could explain everything could not explain this! Humiliating. Who had written it?
Why had it been written? Until he found that out he would never know a moment’s peace. Suddenly he came out of his reverie to be aware of a peculiar gasping noise. He looked sharply down. On the floor, busy with a dustpan and brush was a tow-headed creature in a flowered overall. She was staring at the paper in his hand with large round eyes.