Lupin’s office door was open. He had already packed most of his things. The Grindylow’s empty tank stood next to his battered old suitcase, which was open and nearly full. Lupin was bending over something on his desk, and only looked up when Harry knocked on the door. ‘I saw you coming,’ said Lupin, smiling. He pointed to the parchment he had been poring over. It was the Marauder’s Map.
