“I see,” said Dumbledore kindly, when Malfoy neither moved nor spoke. “You are afraid to act until they join you.”
“I’m not afraid!” snarled Malfoy, though he still made no move to hurt Dumbledore. “It’s you who should be scared!”
“But why? I don’t think you will kill me, Draco. Killing is not nearly as easy as the innocent believe… so tell me, while we wait for your friends… how did you smuggle them in here? It seems to have taken you a long time to work out how to do it.”
Malfoy looked as though he was fighting down the urge to shout, or to vomit. He gulped and took several deep breaths, glaring at Dumbledore, his wand pointing directly at the latter’s heart. Then, as though he could not help himself, he said, “I had to mend that broken Vanishing Cabinet that no one’s used for years. The one Montague got lost in last year.”