But Petunia was running away.

But Petunia was running away. Lily rounded on Snape.

“Did you make that happen?”

“No.” He looked both defiant and scared.

“You did!” She was backing away from him. “You did! You hurt her!”

“No – no, I didn’t!”

But the lie did not convince Lily. After one last burning look, she ran from the little thicket, off after her sister, and Snape looked miserable and confused…

And the scene re-formed. Harry looked around. He was on platform nine and three quarters, and Snape stood beside him, slightly hunched, next to a thin, sallow-faced, sour-looking woman who greatly resembled him. Snape was staring at a family of four a short distance away. The two girls stood a little apart from their parents. Lily seemed to be pleading with her sister. Harry moved closer to listen.

“…I’m sorry, Tuney, I’m sorry! Listen – ” She caught her sister’s hand and held tight to it, even though Petunia tried to pull it away. “Maybe once I’m there – no, listen, Tuney! Maybe once I’m there, I’ll be able to go to Professor Dumbledore and persuade him to change his mind!”

“I don’t – want – to – go!” said Petunia, and she dragged her hand back out of her sister’s grasp. “You think I want to go to some stupid castle and learn to be a – a…”

Her pale eyes roved over the platform, over the cats mewling in their owners’ arms, over the owls, fluttering and hooting at each other in cages, over the students, some already in their long black robes, loading trunks onto the scarlet steam engine or else greeting one another with glad cries after a summer apart.

“ – you think I want to be a – a freak?”

Lily’s eyes filled with tears as Petunia succeeded in tugging her hand away.

“I’m not a freak,” said Lily. “That’s a horrible thing to say.”

“That’s where you’re going,” said Petunia with relish. “A special school for freaks. You and that Snape boy…weirdos, that’s what you two are. It’s good you’re being separated from normal people. It’s for our safety.”

Lily glanced toward her parents, who were looking around the platform with an air of wholehearted enjoyment, drinking in the scene. Then she looked back at her sister, and her voice was low and fierce.

“You didn’t think it was such a freak’s school when you wrote to the headmaster and begged him to take you.”

Petunia turned scarlet.

“Beg? I didn’t beg!”

“I saw his reply. It was very kind.”

“You shouldn’t have read – ” whispered Petunia, “that was my private – how could you –?”

Lily gave herself away by half-glancing toward where Snape stood nearby. Petunia gasped.

“That boy found it! You and that boy have been sneaking in my room!”

“No – not sneaking – “ Now Lily was on the defensive. ”Severus saw the envelope, and he couldn’t believe a Muggle could have contacted Hogwarts, that’s all! He says there must be wizards working undercover in the postal service who take care of – “

“Apparently wizards poke their noses in everywhere!“ said Petunia, now as pale as she had been flushed. ”Freak!“ she spat at her sister, and she flounced off to where her parents stood…

The scene dissolved again. Snape was hurrying along the corridor of the Hogwarts Express as it clattered through the countryside. He had already changed into his school robes, had perhaps taken the first opportunity to take off his dreadful Muggle clothes. At last he stopped, outside a compartment in which a group of rowdy boys were talking. Hunched in a corner seat beside the window was Lily, her face pressed against the windowpane.

Snape slid open the compartment door and sat down opposite Lily. She glanced at him and then looked back out of the window. She had been crying.

“I don’t want to talk to you,” she said in a constricted voice.

“Why not?”

“Tuney h-hates me. Because we saw that letter from Dumbledore.“

“So what?”

She threw him a look of deep dislike.

“So she’s my sister!”

“She’s only a – “ He caught himself quickly; Lily, too busy trying to wipe her eyes without being noticed, did not hear him.

“But we’re going!” he said, unable to suppress the exhilaration in his voice. “This is it! We’re off to Hogwarts!”

She nodded, mopping her eyes, but in spite of herself, she half smiled.