"You won't find him if he doesn't want to be found." Madame Jocastra interrupted. She spoke seriously, but the position of her wrinkles expressed all her mockery. "He knows many tricks. He used a very powerful Disillusionment Charm, and only young Malfoy could see him. But there's more, my dear girl. He wasn't who he said he was. Our Death Eater used the Potion Polyjuice, before revealing himself to his victim." The woman crowned the revelation with a wide toothless smile.