"Has it occurred to you, Harry," said Arthur, "that Snape was simply pretending--?"
"Pretending to offer help, so that he could find out what Malfoy's up to?" said Harry quickly. "Yeah, I thought you'd say that. But how do we know?"
"It isn't our business to know," said Lupin unexpectedly. He had turned his back on the fire now and faced Harry across Arthur. "It's Dumbledore's business. Dumbledore trusts Severus, and that ought to be good enough for all of us."
"But," said Harry, "just say--just say Dumbledore's wrong about Snape --"
"People have said it, many times. It comes down to whether or not you trust Dumbledore's judgment. I do; therefore, I trust Severus."
"But Dumbledore can make mistakes," argued Harry. "He says it himself. And you--"
He looked Lupin straight in the eye.
"--do you honestly like Snape?"
"I neither like nor dislike Severus," said Lupin. "No, Harry, I am speaking the truth," he added, as Harry pulled a skeptical expression. "We shall never be bosom friends, perhaps; after all that happened between James and Sirius and Severus, there is too much bitterness there. But I do not forget that during the year I taught at Hogwarts, Severus made the Wolfsbane Potion for me every month, made it perfectly, so that I did not have to suffer as I usually do at the full moon."
"But he 'accidentally' let it slip that you're a werewolf, so you had to leave!" said Harry angrily.
Lupin shrugged.
"The news would have leaked out anyway. We both know he wanted my job, but he could have wreaked much worse damage on me by tampering with the potion. He kept me healthy. I must be grateful."
"Maybe he didn't dare mess with the potion with Dumbledore watching him!" said Harry.
"You are determined to hate him, Harry," said Lupin with a faint smile. "And I understand; with James as your father, with Sirius as your godfather, you have inherited an old prejudice. By all means tell Dumbledore what you have told Arthur and me, but do not expect him to share your view of the matter; do not even expect him to be surprised by what you tell him. It might have been on Dumbledore's orders that Severus questioned Draco."
Celestina ended her song on a very long, high-pitched note and loud applause issued out of the wireless, which Mrs. Weasley joined in with enthusiastically.
"Eez eet over?" said Fleur loudly. "Thank goodness, what an 'orrible --"
"Shall we have a nightcap, then?" asked Arthur loudly, leaping to his feet. "Who wants eggnog?"
"What about you, Sirius?" Harry asked.
Sirius considered this for a whole minute. "I trust Dumbledore's judgment," he said finally. "That's the only thing we can do right now. Any other time you tell me this, I would've told you to stay away from Severus- but..."
"But?" I asked.
"He'd already been through Harry's classes by himself," Sirius said. "He could've killed Harry as easily as an ant stepping on a boot."
I nodded. "Fair point."
Harry paused for a moment, taking deep breaths in. "What have you been up to lately?" he asked Lupin, as Arthur bustled off to fetch the eggnog, and everybody else stretched and broke into conversation.
"Oh, I've been underground," said Lupin. "Almost literally. That's why I haven't been able to write, Harry; sending letters to you would have been something of a give-away."
"What do you mean?"
"I've been living among my fellows, my equals," said Lupin. "Werewolves," he added, at Harry's look of incomprehension. "Nearly all of them are on Voldemort's side. Dumbledore wanted a spy and here I was... ready-made."
He sounded a little bitter, and perhaps realized it, for he smiled more warmly as he went on, "I am not complaining; it is necessary work and who can do it better than I? However, it has been difficult gaining their trust. I bear the unmistakable signs of having tried to live among wizards, you see, whereas they have shunned normal society and live on the margins, stealing--and sometimes killing--to eat."
"How come they like Voldemort?"
"They think that, under his rule, they will have a better life," said Lupin. "And it is hard to argue with Greyback out there..."
"Who's Greyback?"
"You haven't heard of him?" Lupin's hands closed convulsively in his lap. "Fenrir Greyback is, perhaps, the most savage werewolf alive today. He regards it as his mission in life to bite and to contaminate as many people as possible; he wants to create enough werewolves to overcome the wizards. Voldemort has promised him prey in return for his services. Greyback specializes in children... bite them young, he says, and raise them away from their parents, raise them to hate normal wizards. Voldemort has threatened to unleash him upon people's sons and daughters; it is a threat that usually produces good results."
Lupin paused and then said, "It was Greyback who bit me."
"What?" said Harry, astonished. "When--when you were a kid, you mean?"
"Yes. My father had offended him. I did not know, for a very long time, the identity of the werewolf who had attacked me; I even felt pity for him, thinking that he had had no control, knowing by then how it felt to transform. But Greyback is not like that. At the full moon, he positions himself close to victims, ensuring that he is near enough to strike. He plans it all. And this is the man Voldemort is using to marshal the werewolves. I cannot pretend that my particular brand of reasoned argument is making much headway against Greyback's insistence that we werewolves deserve blood, that we ought to revenge ourselves on normal people."
"But you are normal!" said Harry fiercely. "You've just got a--a problem--"
Lupin and Sirius burst out laughing. "Sometimes you remind me a lot of James. He called it my 'furry little problem' in company. Many people were under the impression that I owned a badly behaved rabbit."
He accepted a glass of eggnog from Arthur with a word of thanks, looking slightly more cheerful.
"Have you ever heard of someone called the Half-Blood Prince?" Harry asked.
"The Half-Blood what?"
"Prince," said Harry, watching him closely for signs of recognition.
"There are no Wizarding princes," said Sirius. "Is this a title you're thinking of adopting? I should have thought being the 'Chosen One' would be enough."
"It's nothing to do with me!" said Harry indignantly. "The Half-Blood Prince is someone who used to go to Hogwarts, I've got his old Potions book. He wrote spells all over it, spells he invented. One of them was Levicorpus--"
"Oh, that one had a great vogue during my time at Hogwarts," said Lupin reminiscently. "There were a few months in my fifth year when you couldn't move for being hoisted into the air by your ankle."
"My dad used it," said Harry. "I saw him in the Pensieve, he used it on Snape."
He tried to sound casual, as though this was a throwaway comment of no real importance, but he was not sure he had achieved the right effect; Lupin's smile was a little too understanding.
"Yes," he said, "but he wasn't the only one. As I say, it was very popular... You know how these spells come and go..."
"But it sounds like it was invented while you were at school," Harry persisted.
"Not necessarily," said Lupin. "Jinxes go in and out of fashion like everything else." He looked into Harry's face and then said quietly, "James was a pure-blood, Harry, and I promise you, he never asked us to call him 'Prince.'"
Abandoning pretense, Harry said, "And it wasn't you, Sirius? Or you?"
"Definitely not."
"Oh." Harry stared into the fire. "I just thought--well, he's helped me out a lot in Potions classes, the Prince has."
"How old is this book, Harry?"
"I dunno, I've never checked."
"Well, perhaps that will give you some clue as to when the Prince was at Hogwarts," said Lupin.
Shortly after this, Fleur decided to imitate Celestina singing "A Cauldron Full of Hot, Strong Love," which was taken by everyone, once they had glimpsed Molly's expression, to be the cue to go to bed.
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