Méfie-toi de celui qui rit avant de parler!
Distrust the man who smiles before he speaks.
Alphonse Daudet, Tartarin sur les Alpes (1885); Katharine Prescott Wormeley (trans.) Tartarin of Tarascon. To Which is Added Tartarin on the Alps (Boston: Little, Brown, 1900) p. 241.