"Now, as for the rules. As you’re all adults, you have no curfew. I expect this privilege not to be exploited to the point where it interferes with your school work. I also extend the invitation to leave the grounds whenever you wish. However, I stress that you inform me first. Send a patronus if you’re able, see me in my office, send me a note. I also strongly encourage you to let another classmate know of your location if you’re not comfortable telling me.