It had been a week since she was brought to Hogwarts, and she had been doing this every night. Once the other girls were asleep, she would creep out of her dormitory and to the deserted, closed library. She would unlock the door with a spell he had taught her and spend the night there, slinking around the shelves with a lamp in her hand. She even slept there, on a conjured blanket on the floor, concealed between two floor-to-ceiling rows of books.