Sirius stood straight. "I am Sirius Black, Head of House Black; you will address me as "Lord Black,’ Headmaster Dumbledore, since I no longer give you free use of my first name. As for my Secret, Headmaster, that is for me to tell, or to show the written text of, to those whom I trust—a state which no longer describes you. Now, Headmaster, quit bothering me—I’m no longer your student, no longer a member of your cult of personality, and you have no claim to me. Come, Harry; come, Hermione; we have ice cream to eat."