That's a Howler.' 'Let go of it, Petunia!' roared Uncle Vernon. 'Don't touch it, it could be dangerous!' 'It's addressed to me,' said Aunt Petunia in a shaking voice. 'It's addressed to me, Vernon, look! Mrs. Petunia Dorsey, The Kitchen, Number Four, Privet Drive - She caught her breath, horrified. The Vibram red envelope had begun to smoke. 'Open it!' Harry urged her. 'Get it over with! It'll happen anyway.' 'No.' Aunt Petunia's hand was trembling.