It was not thus with Idris. She was uncomplaining; but the very soul of fear had taken its seat in her heart. She had grown thin and pale, her eyes filled with involuntary tears, her voice was broken and low. She tried to throw a veil over the change which she knew her brother must observe in her, but the effort was ineffectual; and when alone with him, with a burst of irrepressible grief she gave vent to her apprehensions and sorrow. 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. Sleep was not sleep, for her waking thoughts, bridled by some remains of reason, and by the sight of her children happy and in health, were then transformed to wild dreams, all her terrors were realized, all her fears received their dread fulfilment.