After spending the weekend reading A History of Hogwarts, the girl had a strong desire to share her discoveries with someone. She hadn't had much fun telling her mother, who knew that book better than she did, or her father, who was always distracted. Hugo was still too young to pay attention, and her grandparents were always busy. Albus was the best audience Rose could have wished for because, in addition to always being eager to listen, he literally hung on her every word.