I afterwards sat with Isabella from five till half-past six, while there Lady Darnley and her daughters came there. They brought General Stuart’s son, a boy of near seven with them. I never saw so agreeable, clever, or charming a boy. They say his passions are dreadful and uncontrolled, but he was in a very good humour, gave his opinion on every subject, joined in conversation, and sung an Italian song for us. I should be terrified if I had such a child!