"Come on," he held out his arm to her, and she grasped it while he Apparated them outside to the front gate. "We could do this anywhere," he explained, "but I've always found that the gate is a helpful physical representation of the protections on the house." Hermione watched, fascinated, as he raised his wand and began chanting in Latin, glowing runes appearing in the air in front of him. He opened the bottle with her blood in it and the droplets levitated out, swirling around the runes and disappearing into them. Draco finished his spell with a flourish of his wand then turned toward Hermione, tucking her face into his chest just moments before a blinding flash signalled the completion of the warding. When Hermione looked again, the runes had vanished.