"'Tis a gloomy place and a strong one," Dame Margaret said with a shiver as she looked at its frowning towers; "the poor wretches who are once entombed there can have but little hope of escape. Surely there cannot be so many state prisoners as to need for their keeping, a building so large as that. Still, with so turbulent a population as this of Paris, it doubtless needs a strong castle to hold them."