Severus actually looked startled to see Remus and was about to say something hurtful because he realized who it was. His forehead smoothed out. He was not the sort of person to spill the beans about what was bothered him. "Have to take a trip tomorrow. Will be a few days. Not too pleased about having to go home for that long." He looked over Remus, glad to see he was standing up straighter. "You wanted to copy my potions notes?"