Filled with ironical melancholy, Swann watched them as they listened to the pianoforte intermezzo (Liszt's 'Saint Francis preaching to the birds') which came after the flute, and followed the virtuoso in his dizzy flight; Mme. de Franquetot anxiously, her eyes starting from her head, as though the keys over which his fingers skipped with such agility were a series of trapezes, from any one of which he might come crashing, a hundred feet, to the ground, stealing now and then a glance of astonishment and unbelief at her companion, as who should say: "It isn't possible, I would never have believed that a human being could do all that!"; Mme. de Cambremer, as a woman who had received a sound musical education, beating time with her head—transformed for the nonce into the pendulum of a metronome, the sweep and rapidity of whose movements from one shoulder to the other (performed with that look of wild abandonment in her eye which a sufferer shews who is no longer able to analyse his pain, nor anxious to master it, and says merely "I can't help it") so increased that at every moment her diamond earrings caught in the trimming of her bodice, and she was obliged to put straight the bunch of black grapes which she had in her hair, though without any interruption of her constantly accelerated motion.