"That... was your Potions Professor. Be careful around him, both of you." Remus looked at Snape as he left, a strange emotion forming on his face. Harry wanted to ask more, but a loud whistle announced that the train would leave soon. Remus quickly enveloped his son in a tight hug. "Write to me anytime. I know this is a scary time, and I am sorry for abandoning you soon. I wish I could be there for you. If there are any problems, talk to me immediately."