Among all these people, some of whom were pursuing a train of thought, but if so betrayed its instability by spasmodic gestures, a roving gaze as little in keeping as the circumspect titubation of their neighbours, the girls whom I had noticed, with that mastery over their limbs which comes from perfect bodily condition and a sincere contempt for the rest of humanity, were advancing straight ahead, without hesitation or stiffness, performing exactly the movements that they wished to perform, each of their members in full independence of all the rest, the greater part of their bodies preserving that immobility which is so noticeable in a good waltzer.