After silence reigned for a long while, Weasley looked around, brows lowered. "Well, are you going to tell us how?" The question, directed at Blaise, sent all eyes to the tall Italian man. He was opening his mouth to speak when Potter lifted a hand, "Wait." He made a sweeping gesture with his hand and Draco felt a shiver of magic move through the room. "Privacy charm, Susan's still here," Potter said by way of explanation. "Go on then, Blaise."