As they talked, their faces made all kinds of movements and the tone of their voices seemed to have a life of its own. He noticed one sister saying yes to something while actually shaking her head no. If people said yes, but really felt no, it appeared to show up in their grimaces or body language. A very deliberate brushing back of the strands of her hair would indicate impatience. But a quicker, more unconscious stroke could indicate rapt attention. His breathing patterns fascinated him; certain rhythms indicated boredom and were generally followed by yawn.