“The man who had a duplicate key, the man who ordered the lock, the man who has not been severely ill with bronchitis at his home in the country⁠— enfin , that ‘stodgy’ old man, Mr. Shaw! There are criminals in high places sometimes, my friend. Ah, here we are. Mademoiselle, I have succeeded! You permit?”

And, beaming, Poirot kissed the astonished girl lightly on either cheek!