"Narcissa sent me here, to the ancient seat of my family," Harry explained. "Celtic magic protected it, you know, as soon as I arrived and essentially took ownership. It activated all sorts of ancient protections. It's also the headquarters of an equally ancient group of knights, warrior-wizards sworn to protect my family line. The Knights of St David, they are called. I spent the first three months of my resurrection learning all about them. My mother and father knew all about it, too. They were members, or under their protection."