Harry Potter and the Half-Blood Prince

Meanwhile, the Hogwarts library had failed Hermione for the first lime in living memory. She was so shocked, she even forgot that she was annoyed at Harry for his trick with the bezoar.

“I haven’t found one single explanation of what Horcruxes do!” she told him. “Not a single one! I’ve been right through the restricted section and even in the most horrible books, where they tell you how to brew the most gruesome potions—nothing! All I could find was this, in the introduction to Magick Most Evil—listen—‘of the Horcrux, wickedest of magical inventions, we shall not speak nor give direction’… I mean, why mention it, then?” she said impatiently, slamming the old book shut; it let out a ghostly wail. “Oh, shut up,” she snapped, stuffing it back into her bag.

The snow melted around the school as February arrived, to be replaced by cold, dreary wetness. Purplish-grey clouds hung low over the castle and a constant fall of chilly rain made the lawns slippery and muddy. The upshot of this was that the sixth-years’ first Apparition lesson, which was scheduled for a Saturday morning so that no normal lessons would be missed, took place in the Great Hall instead of in the grounds.

When Harry and Hermione arrived in the Hall (Ron had come down with Lavender) they found that the tables had disappeared. Rain lashed against the high windows and the enchanted ceiling swirled darkly above them as they assembled in front of Professors McGonagall, Snape, Flitwick and Sprout—the Heads of House—and a small wizard whom Harry took to be the Apparition Instructor from the Ministry. He was oddly colourless, with transparent eyelashes, wispy hair and an insubstantial air, as though a single gust of wind might blow him away. Harry wondered whether constant disappearances and reappearances had somehow diminished his substance, or whether this frail build was ideal for anyone wishing to vanish.

“Good morning,” said the Ministry wizard, when all the students had arrived and the Heads of House had called for quiet. “My name is Wilkie Twycross and I shall be your Ministry-Apparition Instructor for the next twelve weeks. I hope to be able to prepare you for your Apparition test in this time—”

“Malfoy, be quiet and pay attention!” barked Professor McGonagall.

Everybody looked round. Malfoy had flushed a dull pink; he looked furious as he stepped away from Crabbe, with whom he appeared to have been having a whispered argument. Harry glanced quickly at Snape, who also looked annoyed, though Harry strongly suspected that this was less because of Malfoy’s rudeness than the fact that McGonagall had reprimanded one of his house.

“—by which time, many of you may be ready to take your test,” Twycross continued, as though there had been no interruption.

“As you may know, it is usually impossible to Apparate or Disapparate within Hogwarts. The Headmaster has lifted this enchantment, purely within the Great Hall, for one hour, so as to enable you to practise. May I emphasise that you will not be able to Apparate outside the walls of this Hall, and that you would be unwise to try.

“I would like each of you to place yourselves now so that you have a clear five feet of space in front of you.”

There was a great scrambling and jostling as people separated, banged into each other, and ordered others out of their space. The Heads of House moved among the students, marshalling them into position and breaking up arguments.

“Harry, where are you going?” demanded Hermione.

But Harry did not answer; he was moving quickly through the crowd, past the place where Professor Flitwick was making squeaky attempts to position a few Ravenclaws, all of whom wanted to be near the front, past Professor Sprout, who was chivvying the Hufflepuffs into line, until, by dodging around Ernie Macmillan, he managed to position himself right at the back of the crowd, directly behind Malfoy, who was taking advantage of the general upheaval to continue his argument with Crabbe, standing five feet away and looking mutinous.

“I don’t know how much longer, all right?” Malfoy shot at him, oblivious to Harry standing right behind him. “It’s taking longer than I thought it would.”

Crabbe opened his mouth, but Malfoy appeared to second-guess what he was going to say.

“Look, it’s none of your business what I’m doing, Crabbe, you and Goyle just do as you’re told and keep a lookout!”

“I tell my friends what I’m up to, if I want them to keep a lookout for me,” Harry said, just loud enough for Malfoy to hear him.

Malfoy spun round on the spot, his hand flying to his wand, but at that precise moment the four Heads of House shouted, “Quiet!” and silence fell again. Malfoy turned slowly to face the front.

“Thank you,” said Twycross. “Now then…”

He waved his wand. Old-fashioned wooden hoops instantly appeared on the floor in from of every student.

“The important things to remember when Apparating are the three Ds!” said Twycross. “Destination, Determination, Deliberation!”