“ Pas du tout ,” said Poirot briskly. “She came by the advice of Mary Cavendish to seek my aid in her dilemma. Then she heard that Mary Marvell, whom she knew to be her enemy, had been here, and she changed her mind, jumping at a pretext that you , my friend, offered her. A very few questions sufficed to show me that you told her of the letters, not she you! She jumped at the chance your words offered.”

“I don’t believe it,” I cried, stung.