Mme. Verdurin, seeing that Swann was within earshot, assumed that expression in which the two-fold desire to make the speaker be quiet and to preserve, oneself, an appearance of guilelessness in the eyes of the listener, is neutralised in an intense vacuity; in which the unflinching signs of intelligent complicity are overlaid by the smiles of innocence, an expression invariably adopted by anyone who has noticed a blunder,