Harry swallowed and answered reluctantly, "It was in the sixth year. It had a spell written in it - a spell that I hadn’t known what it did, until I used it on you," he said quietly, and realisation dawned on Draco’s face, "I don’t think I ever apologised for that," his eyes flicked to Draco’s chest, wondering if he had still had the scars in their past life, "I am - sorry, that is," but Draco only shook his head.