Anna ... almost laughed aloud at the feeling of delight that all at once without cause came over her. She felt as though her nerves were strings being strained tighter and tighter on some sort of screwing peg. She felt her eyes opening wider and wider, her fingers and toes twitching nervously, something within oppressing her breathing, while all shapes and sounds seemed in the uncertain half-light to strike her with unaccustomed vividness.