Patches of bright blue sky were beginning to appear over the castle turrets, but these signs of approaching summer did not lift Harry’s mood. He had been thwarted, both in his attempts to find out what Malfoy was doing, and in his efforts to start a conversation with Slughorn that might lead, somehow, to Slughorn handing over the memory he had apparently suppressed for decades.

“For the last time, just forget about Malfoy,” Hermione told Harry firmly.

They were sitting with Ron in a sunny corner of the courtyard after lunch. Hermione and Ron were both clutching a Ministry of Magic leaflet — Common Apparition Mistakes and How to Avoid Them — for they were taking their tests that very afternoon, but by and large the leaflets had not proved soothing to the nerves.

Ron gave a start and tried to hide behind Hermione as a girl came around the corner.

“It isn’t Lavender,” said Hermione wearily.

“Oh, good,” said Ron, relaxing.

“Harry Potter?” said the girl. “I was asked to give you this.”

“Thanks…”

Harry’s heart sank as he took the small scroll of parchment. Once the girl was out of earshot he said, “Dumbledore said we wouldn’t be having any more lessons until I got the memory!”

“Maybe he wants to check on how you’re doing?” suggested Hermione, as Harry unrolled the parchment; but rather than finding Dumbledore’s long, narrow, slanted writing he saw an untidy sprawl, very difficult to read due to the presence of large blotches on the parchment where the ink had run.

Dear Harry, Ron and Hermione!

Aragog died last night. Harry and Ron, you met him and you know how special he was.

Hermione, I know you’d have liked him.

It would mean a lot to me if you’d nip down for the burial later this evening.

I’m planning on doing it round dusk, that was his favorite time of day.

I know you’re not supposed to be out that late, but you can use the cloak.

Wouldn’t ask, but I can’t face it alone.

Hagrid

“Look at this,” said Harry, handing the note to Hermione. “Oh, for heaven’s sake,” she said, scanning it quickly and passing it to Ron, who read it through looking increasingly incredulous. “He’s mental” he said furiously. “That thing told its mates to eat Harry and me! Told them to help themselves! And now Hagrid expects us to go down there and cry over its horrible hairy body!”

“Its not just that,” said Hermione. “He’s asking us to leave the castle at night and he knows security’s a million times tighter and how much trouble we’d be in if we were caught.”

“We’ve been down to see him by night before,” said Harry.

“Yes, but for something like this?” said Hermione. “We’ve risked a lot to help Hagrid out, but after all — Aragog’s dead. If it were a question of saving him —”

“— I’d want to go even less,” said Ron firmly. “You didn’t meet him, Hermione. Believe me, being dead will have improved him a lot.”

Harry took the note back and stared down at all the inky blotches all over it. Tears had clearly fallen thick and fast upon the parchment…

“Harry, you can’t be thinking of going,” said Hermione. “It’s such a pointless thing to get detention for.”

Harry sighed. “Yeah, I know,” he said. “I s’pose Hagrid’ll have to bury Aragog without us.”

“Yes, he will,” said Hermione, looking relieved. “Look, Potions will be almost empty this afternoon, with us all off doing our tests… Try and soften Slughorn up a bit then!”

“Fifty-seventh time lucky, you think?” said Harry bitterly.

“Lucky,” said Ron suddenly. “Harry, that’s it — get lucky!”

“What d’you mean?”

“Use your lucky potion!”

“Ron, that’s — that’s it!” said Hermione, sounding stunned. “Of course! Why didn’t I think of it?”

Harry stared at them both. “Felix Felicis?” he said. “I dunno… I was sort of saving it…”

“What for?” demanded Ron incredulously.

“What on earth is more important than this memory, Harry?” asked Hermione.

Harry did not answer. The thought of that little golden bottle had hovered on the edges of his imagination for some time; vague and unformulated plans that involved Ginny splitting up with Dean, and Ron somehow being happy to see her with a new boyfriend, had been fermenting in the depths of his brain, unacknowledged except during dreams or the twilight time between sleeping and waking…

“Harry? Are you still with us?” asked Hermione.

“Wha — ? Yeah, of course,” he said, pulling himself together. “Well… okay. If I can’t get Slughorn to talk this afternoon, I’ll take some Felix and have another go this evening.”

“That’s decided, then,” said Hermione briskly, getting to her feet and performing a graceful pirouette. “Destination… determination… deliberation…” she murmured.

“Oh, stop that,” Ron begged her, “I feel sick enough as it is — quick, hide me!”

“It isn’t Lavender!” said Hermione impatiently, as another couple of girls appeared in the courtyard and Ron dived behind her.

“Cool,” said Ron, peering over Hermiones shoulder to check. “Blimey, they don’t look happy, do they?”

“They’re the Montgomery sisters and of course they don’t look happy, didn’t you hear what happened to their little brother?” said Hermione.

“I’m losing track of what’s happening to everyone’s relatives, to be honest,” said Ron.

“Well, their brother was attacked by a werewolf. The rumor is that their mother refused to help the Death Eaters. Anyway, the boy was only five and he died in St. Mungos, they couldn’t save him.”

“He died?” repeated Harry, shocked. “But surely werewolves don’t kill, they just turn you into one of them?”

“They sometimes kill,” said Ron, who looked unusually grave now. “I’ve heard of it happening when the werewolf gets carried away.”

“What was the werewolf’s name?” said Harry quickly.

“Well, the rumor is that it was that Fenrir Greyback,” said Hermione.

“I knew it — the maniac who likes attacking kids, the one Lupin told me about!” said Harry angrily.

Hermione looked at him bleakly.

“Harry, you’ve got to get that memory,” she said. “It’s all about stopping Voldemort, isn’t it? These dreadful things that are happening are all down to him…”

The bell rang overhead in the castle and both Hermione and Ron jumped to their feet, looking terrified.

“You’ll do fine,” Harry told them both, as they headed toward the entrance hall to meet the rest of the people taking their Apparition Test. “Good luck.”

“And you too!” said Hermione with a significant look, as Harry headed off to the dungeons.

There were only three of them in Potions that afternoon: Harry, Ernie, and Draco Malfoy.

“All too young to Apparate just yet?” said Slughorh genially, “Not turned seventeen yet?”

They shook their heads.

“Ah well,” said Slughorn cheerily, “as we’re so few, we’ll do something for fun. I want you all to brew me up something amusing!”

“That sounds good, sir,” said Ernie sycophantically, rubbing his hands together. Malfoy, on the other hand, did not crack a smile. “What do you mean, ‘something amusing’?” he said irritably. “Oh, surprise me,” said Slughorn airily.

Malfoy opened his copy of Advanced Potion-Making with a sulky expression. It could not have been plainer that he thought this lesson was a waste of time. Undoubtedly, Harry thought, watching him over the top of his own book, Malfoy was begrudging the time he could otherwise be spending in the Room of Requirement.

Was it his imagination, or did Malfoy, like Tonks, look thinner! Certainly he looked paler; his skin still had that grayish tinge, probably because he so rarely saw daylight these days. But there was no air of smugness, excitement, or superiority; none of the swagger that he had had on the Hogwarts Express, when he had boasted openly of the mission he had been given by Voldemort… There could be only one conclusion, in Harry’s opinion: The mission, whatever it was, was going badly.

Cheered by this thought, Harry skimmed through his copy of Advanced Potion-Making and found a heavily corrected Half-Blood Prince’s version of “An Elixir to Induce Euphoria,” which seemed not only to meet Slughorn’s instructions, but which might (Harry’s heart leapt as the thought struck him) put Slughorn into such a good mood that he would be prepared to hand over that memory if Harry could persuade him to taste some…

“Well, now, this looks absolutely wonderful,” said Slughorn an hour and a half later, clapping his hands together as he stared down into the sunshine yellow contents of Harry’s cauldron. “Euphoria, I take it? And what’s that I smell? Mmmm… you’ve added just a sprig of peppermint, haven’t you? Unorthodox, but what a stroke of inspiration, Harry, of course, that would tend to counterbalance the occasional side effects of excessive singing and nose-tweaking… I really don’t know where you get these brain waves, my boy… unless —”

Harry pushed the Half-Blood Prince’s book deeper into his bag with his foot.

“— it’s just your mother’s genes coming out in you!”

“Oh… yeah, maybe,” said Harry, relieved.

Ernie was looking rather grumpy; determined to outshine Harry for once, he had most rashly invented his own potion, which had curdled and formed a kind of purple dumpling at the bottom of his cauldron. Malfoy was already packing up, sour-faced; Slughorn had pronounced his Hiccuping Solution merely “passable.”

The bell rang and both Ernie and Malfoy left at once. “Sir,” Harry began, but Slughorn immediately glanced over his shoulder; when he saw that the room was empty but for himself and Harry, he hurried away as fast as he could.

“Professor — Professor, don’t you want to taste my po — ?” called Harry desperately.

But Slughorn had gone. Disappointed, Harry emptied the cauldron, packed up his things, left the dungeon, and walked slowly back upstairs to the common room.

Ron and Hermione returned in the late afternoon.

“Harry!” cried Hermione as she climbed through the portrait hole. “Harry, I passed!”

“Well done!” he said. “And Ron?”

“He — he just failed,” whispered Hermione, as Ron came slouching into the room looking most morose. “It was really unlucky, a tiny thing, the examiner just spotted that he’d left half an eyebrow behind… How did it go with Slughorn?”