She described in vivid terms the ceaseless care that with still renewing hunger ate into her soul; she compared this gnawing of sleepless expectation of evil, to the vulture that fed on the heart of Prometheus; under the influence of this eternal excitement, and of the interminable struggles she endured to combat and conceal it, she felt, she said, as if all the wheels and springs of the animal machine worked at double rate, and were fast consuming themselves.