            Ollivander nodded. "In theory, it would work. However, the Book is not the only system of tracing in the Ministry arsenal. You are familiar with the taboo on You Know Who’s name?" At their confirmation, he continued, "I believe that ever since the Second War, the Ministry has been developing a similar process of their own. Mr. Black’s name could become linked with the magical signature of his outburst. Any spellwork, intended or otherwise, could light up his location on a map like twinkling Christmas lights."