“Wizard!” she shrieked, her courage returned now that she had recovered from the shock of his unexpected appearance. “I know who you are. You’re that Snape boy! They live down Spinner’s End by the river,” she told Lily, and it was evident from her tone that she considered the address a poor recommendation. “Why have you been spying on us?”
“Haven’t been spying,” said Snape, hot and uncomfortable and dirty-haired in the bright sunlight. “Wouldn’t spy on you, anyway,” he added spitefully, “you’re a Muggle.”
Though Petunia evidently did not understand the word, she could hardly mistake the tone.
“Lily, come on, we’re leaving!” she said shrilly. Lily obeyed her sister at once, glaring at Snape as she left. He stood watching them as they marched through the playground gate, and Harry, the only one left to observe him, recognized Snape’s bitter disappointment, and understood that Snape had been planning this moment for a while, and that it had all gone wrong…
The scene dissolved, and before Harry knew it, re-formed around him. He was now in a small thicket of trees. He could see a sunlit river glittering through their trunks. The shadows cast by the trees made a basin of cool green shade. Two children sat facing each other, cross-legged on the ground. Snape had removed his coat now; his odd smock looked less pecular in the half light.
“…and the Ministry can punish you if you do magic outside school, you get letters.”
“But I have done magic outside school!”
“We’re all right. We haven’t got wands yet. They let you off when you’re a kid and you can’t help it. But once you’re eleven,” he nodded importantly, “and they start training you, then you’ve got to go careful.”
There was a little silence. Lily had picked up a fallen twig and twirled it in the air, and Harry knew that she was imagining sparks trailing from it. Then she dropped the twig, leaned in toward the boy, and said, “It is real, isn’t it? It’s not a joke? Petunia says you’re lying to me. Petunia says there isn’t a Hogwarts. It is real, isn’t it?”
“It’s real for us,” said Snape. “Not for her. But we’ll get the letter, you and me.”
“Really?” whispered Lily.
“Definitely,” said Snape, and even with his poorly cut hair and his odd clothes, he struck an oddly impressive figure sprawled in front of her, brimful of confidence in his destiny.
“And will it really come by owl?” Lily whispered.
“Normally,” said Snape. “But you’re Muggle-born, so someone from the school will have to come and explain to your parents.”