“It’s a sport,” he said shortly. “Played on broom—”

“All right, all right!” said Uncle Vernon loudly. Harry saw, with some satisfaction, that his uncle looked vaguely panicky. Apparently his nerves couldn’t stand the sound of the word “broomsticks” in his living room. He took refuge in perusing the letter again. Harry saw his lips form the words “send us your answer . . . in the normal way.” He scowled.

“What does she mean, ‘the normal way’?” he spat.

“Normal for us,” said Harry, and before his uncle could stop him, he added, “you know, owl post. That’s what’s normal for wizards.”

Uncle Vernon looked as outraged as if Harry had just uttered a disgusting swear word. Shaking with anger, he shot a nervous look through the window, as though expecting to see some of the neighbors with their ears pressed against the glass.

“How many times do I have to tell you not to mention that unnaturalness under my roof?” he hissed, his face now a rich plum color. “You stand there, in the clothes Petunia and I have put on your ungrateful back—”

“Only after Dudley finished with them,” said Harry coldly, and indeed, he was dressed in a sweatshirt so large for him that he had had to roll back the sleeves five times so as to be able to use his hands, and which fell past the knees of his extremely baggy jeans.

“I will not be spoken to like that!” said Uncle Vernon, trembling with rage.

But Harry wasn’t going to stand for this. Gone were the days when he had been forced to take every single one of the Dursleys’ stupid rules. He wasn’t following Dudley’s diet, and he wasn’t going to let Uncle Vernon stop him from going to the Quidditch World Cup, not if he could help it. Harry took a deep, steadying breath and then said, “Okay, I can’t see the World Cup. Can I go now, then? Only I’ve got a letter to Sirius I want to finish. You know—my godfather.”

He had done it. He had said the magic words. Now he watched the purple recede blotchily from Uncle Vernon’s face, making it look like badly mixed black currant ice cream.

“You’re—you’re writing to him, are you?” said Uncle Vernon, in a would-be calm voice—but Harry had seen the pupils of his tiny eyes contract with sudden fear.

“Well—yeah,” said Harry, casually. “It’s been a while since he heard from me, and, you know, if he doesn’t, he might start thinking something’s wrong.”

He stopped there to enjoy the effect of these words. He could almost see the cogs working under Uncle Vernon’s thick, dark, neatly parted hair. If he tried to stop Harry writing to Sirius, Sirius would think Harry was being mistreated. If he told Harry he couldn’t go to the Quidditch World Cup, Harry would write and tell Sirius, who would know Harry was being mistreated. There was only one thing for Uncle Vernon to do. Harry could see the conclusion forming in his uncle’s mind as though the great mustached face were transparent. Harry tried not to smile, to keep his own face as blank as possible. And then—