Harry stared at Snape. It was surely one thing to respect the Dark Arts as a dangerous enemy, another to speak of them, as Snape was doing, with a loving caress in his voice?

“Your defenses,” said Snape, a little louder, “must therefore be as flexible and inventive as the arts you seek to undo. These pictures” — he indicated a few of them as he swept past — “give a fair representation of what happens to those who suffer, for instance, the Cruciatus Curse” — he waved a hand toward a witch who was clearly shrieking in agony — “feel the Dementor’s Kiss” — a wizard lying huddled and blank-eyed, slumped against a wall — “or provoke the aggression of the Inferius” — a bloody mass upon ground.

“Has an Inferius been seen, then?” said Parvati Patil in a high pitched voice. “Is it definite, is he using them?”

“The Dark Lord has used Inferi in the past,” said Snape, “which means you would be well-advised to assume he might use them again. Now… ”

He set off again around the other side of the classroom toward his desk, and again, they watched him as he walked, his dark robes billowing behind him. ,

“… you are, I believe, complete novices in the use of nonverbal spells. What is the advantage of a nonverbal spell?”

Hermione’s hand shot into the air. Snape took his time looking around at everybody else, making sure he had no choice, before saying curtly, “Very well — Miss Granger?”

“Your adversary has no warning about what kind of magic you’re about to perform,” said Hermione, “which gives you a split-second advantage.”

“An answer copied almost word for word from The Standard Book of Spells, Grade Six,” said Snape dismissively (over in the corner, Malfoy sniggered), “but correct in essentials. Yes, those who progress in using magic without shouting incantations gain an element of surprise in their spell-casting. Not all wizards can do this, of course; it is a question of concentration and mind power which some” — his gaze lingered maliciously upon Harry once more — “lack.”

Harry knew Snape was thinking of their disastrous Occlumency lessons of the previous year. He refused to drop his gaze, but glowered at Snape until Snape looked away.

“You will now divide,” Snape went on, “into pairs. One partner will attempt to jinx the other without speaking. The other will attempt to repel the jinx in equal silence. Carry on.”

Although Snape did not know it, Harry had taught at least half the class (everyone who had been a member of the D.A.) how to perform a Shield Charm the previous year. None of them had ever cast the charm without speaking, however. A reasonable amount of cheating ensued; many people were merely whispering the incantation instead of saying it aloud. Typically, ten minutes into the lesson Hermione managed to repel Neville’s muttered Jelly-Legs Jinx without uttering a single word, a feat that would surely have earned her twenty points for Gryffindor from any reasonable teacher, thought Harry bitterly, but which Snape ignored. He swept between them as they practiced, looking just as much like an overgrown bat as ever, lingering to watch Harry and Ron struggling with the task.

Ron, who was supposed to be jinxing Harry, was purple in the face, his lips tightly compressed to save himself from the temptation of muttering the incantation. Harry had his wand raised, waiting on tenterhooks to repel a jinx that seemed unlikely ever to come.

“Pathetic, Weasley,” said Snape, after a while. “Here — let me show you-”

He turned his wand on Harry so fast that Harry reacted instinctively; all thought of nonverbal spells forgotten, he yelled, “Protego!”

His Shield Charm was so strong Snape was knocked off-balance and hit a desk. The whole class had looked around and now watched as Snape righted himself, scowling.

“Do you remember me telling you we are practicing nonverbal spells, Potter?”

“Yes,” said Harry stiffly.

“Yes, sir.”

“There’s no need to call me ‘sir,’ Professor.” The words had escaped him before he knew what he was saying. Several people gasped, including Hermione. Behind Snape, however, Ron, Dean, and Seamus grinned appreciatively.

“Detention, Saturday night, my office,” said Snape. “I do not take cheek from anyone, Potter… not even ‘the Chosen One.’”

“That was brilliant, Harry!” chortled Ron, once they were safely on their way to break a short while later.

“You really shouldn’t have said it,” said Hermione, frowning at Ron. “What made you?”

“He tried to jinx me, in case you didn’t notice!” fumed Harry. I had enough of that during those Occlumency lessons! Why doesn’t he use another guinea pig for a change? What’s Dumbledore playing at, anyway, letting him teach Defense? Did you hear him talking about the Dark Arts? He loves them! All that unfixed, indestructble stuff —“

“Well,” said Hermione, “I thought he sounded a bit like you.”

“Like me?”

“Yes, when you were telling us what it’s like to face Voldemort. You said it wasn’t just memorizing a bunch of spells, you said it was just you and your brains and your guts — well, wasn’t that what Snape was saying? That it really comes down to being brave and quick-thinking?”

Harry was so disarmed that she had thought his words as well worth memorizing as The Standard Book of Spells that he did not argue.

“Harry! Hey, Harry!”

Harry looked around; Jack Sloper, one of the Beaters on last year’s Gryffindor Quidditch team, was hurrying toward him holding a roll of parchment.

“For you,” panted Sloper. “Listen, I heard you’re the new Captain. When’re you holding trials?”

“I’m not sure yet,” said Harry, thinking privately that Sloper would be very lucky to get back on the team. “I’ll let you know.”

“Oh, right. I was hoping it’d be this weekend -”

“But Harry was not listening; he had just recognized the thin, slanting writing on the parchment. Leaving Sloper in mid-sentence, he hurried away with Ron and Hermione, unrolling the parchment as he went.

Dear Harry, I would like to start our private lessons this Saturday. Kindly come along to my office at 8 P.M. I hope you are enjoying your first day back at school.

Yours sincerely, Albus Dumbledore P.S. I enjoy Acid Pops.

“He enjoys Acid Pops?” said Ron, who had read the message over Harry’s shoulder and was looking perplexed.

“It’s the password to get past the gargoyle outside his study,” said Harry in a low voice. “Ha! Snape’s not going to be pleased… I won’t be able to do his detention!”

He, Ron, and Hermione spent the whole of break speculating on what Dumbledore would teach Harry. Ron thought it most likely to be spectacular jinxes and hexes of the type the Death Eaters would not know. Hermione said such things were illegal, and thought it much more likely that Dumbledore wanted to teach Harry advanced Defensive magic. After break, she went off to Arithmancy while Harry and Ron returned to the common room where they grudgingly started Snape’s homework. This turned out to be so complex that they still had not finished when Hermione joined them for their after-lunch free period (though she considerably speeded up the process). They had only just finished when the bell rang for the afternoon’s double Potions and they beat the familiar path down to the dungeon classroom that had, for so long, been Snape’s.

When they arrived in the corridor they saw that there were only a dozen people progressing to N.E.W.T. level. Crabbe and Goyle had evidently failed to achieve the required O.W.L. grade, but four Slytherins had made it through, including Malfoy. Four Ravenclaws were there, and one Hufflepuff, Ernie Macmillan, whom Harry liked despite his rather pompous manner.

“Harry,” Ernie said portentously, holding out his hand as Harry approached, “didn’t get a chance to speak in Defense Against The Dark Arts this morning. Good lesson, I thought, but Shield Charms are old hat, of course, for us old D.A. lags… And how are you, Ron — Hermione?”

Before they could say more than “fine,” the dungeon door opened and Slughorn’s belly preceded him out of the door. As they filed into the room, his great walrus mustache curved above his beaming mouth, and he greeted Harry and Zabini with particular enthusiasm.

The dungeon was, most unusually, already full of vapors and odd smells. Harry, Ron, and Hermione sniffed interestedly as they passed large, bubbling cauldrons. The four Slytherins took a table together, as did the four Ravenclaws. This left Harry, Ron, and Hermione to share a table with Ernie. They chose the one nearest a gold-colored cauldron that was emitting one of the most seductive scents Harry had ever inhaled: Somehow it reminded him simultaneously of treacle tart, the woody smell of a broomstick handle, and something flowery he thought he might have smelled at the Burrow. He found that he was breathing very slowly and deeply and that the potion’s fumes seemed to be filling him up like drink. A great contentment stole over him; he grinned across at Ron, who grinned back lazily.

“Now then, now then, now then,” said Slughorn, whose massive outline was quivering through the many shimmering vapors. “Scales out, everyone, and potion kits, and don’t forget your copies of Advanced Potion-Making…”

“Sir?” said Harry, raising his hand.

“Harry, m’boy?”

“I haven’t got a book or scales or anything — nor’s Ron — we didn’t realize we’d be able to do the N.E.W.T., you see -”

“Ah, yes, Professor McGonagall did mention… not to worry, my dear boy, not to worry at all. You can use ingredients from the store cupboard today, and I’m sure we can lend you some scales, and we’ve got a small stock of old books here, they’ll do until you can write to Flourish and Blotts…”

Slughorn strode over to a corner cupboard and, after a moment’s foraging, emerged with two very battered-looking copies of Advanced Potion-Making by Libatius Borage, which he gave to Harry and Ron along with two sets of tarnished scales.

“Now then,” said Slughorn, returning to the front of the class and inflating his already bulging chest so that the buttons on his waistcoat threatened to burst off, “I’ve prepared a few potions for you to have a look at, just out of interest, you know. These are the kind of thing you ought to be able to make after completing your N.E.W.T.s. You ought to have heard of ‘em, even if you haven’t made ’em yet. Anyone tell me what this one is?”

He indicated the cauldron nearest the Slytherin table. Harry raised himself slighty in his seat and saw what looked like plain water boiling away inside it.