The Prisoner of Azkaban
Harry didn't return to the kitchen. He went back upstairs to his bedroom. If he was going to act like a real Muggle, heed better start now. Slowly and sadly he gathered up all his presents and his birthday cards and hid them under the loose floorboard with his homework. Then he went to Hedwig's cage. Errol seemed to have recovered; he and Hedwig were both asleep, heads under their wings. Harry sighed, then poked them both awake.