He and all the other Weasleys froze on the threshold, gazing at the scene in front of them, which was also suspended in mid-action, both Sirius and Snape looking towards the door with their wands pointing into each other's faces and Harry immobile between them, a hand stretched out to each, trying to force them apart.Merlin's beard,' said Mr. Weasley, the smile sliding off his face, what's going on here? 'Both Sirius and Snape lowered their wands. Harry looked from one to the other. Each wore an expression of utmost contempt, yet the unexpected entrance of so many witnesses seemed to have brought them to their senses. Snape pocketed his wand, turned on his heel and swept back across the kitchen, passing the Weasleys without comment. At the door he looked back. Six o'clock, Monday evening, Potter. 'And he was gone. Sirius glared after him, his wand at his side. What's been going on? ' asked Mr. Weasley again. Nothing, Arthur,' said Sirius, who was breathing heavily as though he had just run a long distance. Just a friendly little chat between two old school friends. ' With what looked like an enormous effort, he smiled. So . . . you're cured? That's great news, really great. 'Yes, isn't it? ' said Mrs. Weasley, leading her husband forward to a chair. Healer Smethwyck worked his magic in the end, found an antidote to whatever that snake's got in its fangs, and Arthur's learned his lesson about dabbling in Muggle medicine, haven't you, dear? ' she added, rather menacingly. Yes, Molly dear,' said Mr. Weasley meekly. That night's meal should have been a cheerful one, with Mr. Weasley back amongst them. Harry could tell Sirius was trying to make it so, yet when his godfather was not forcing himself to laugh loudly at Fred and George's jokes or offering everyone more food, his face fell back into a moody, brooding expression. Harry was separated from him by Mundungus and Mad-Eye, who had dropped in to offer Mr. Weasley their congratulations. He wanted to talk to Sirius, to tell him he shouldn't listen to a word Snape said, that Snape was goading him deliberately and that the rest of them didn't think Sirius was a coward for doing as Dumbledore told him and remaining in Grimmauld Place. But he had no opportunity to do so, and, eyeing the ugly look on Sirius's face, Harry wondered occasionally whether he would have dared to mention it even if he had the chance. Instead, he told Ron and Hermione under his voice about having to take Occlumency lessons with Snape. Dumbledore wants to stop you having those dreams about Voldemort,' said Hermione at once. Well, you won't be sorry not to have them any more, will you? 'Extra lessons with Snape? ' said Ron, sounding aghast. I'd rather have the nightmares! 'They were to return to Hogwarts on the Knight Bus the following day, escorted once again by Tonks and Lupin, both of whom were eating breakfast in the kitchen when Harry, Ron and Hermione came down next morning. The adults seemed to have been mid-way through a whispered conversation as Harry opened the door; all of them looked round hastily and fell silent. After a hurried breakfast, they all pulled on jackets and scarves against the chilly grey January morning. Harry had an unpleasant constricted sensation in his chest; he did not want to say goodbye to Sirius. He had a bad feeling about this parting; he didn't know when they would next see each other and he felt it was incumbent upon him to say something to Sirius to stop him doing anything stupid-Harry was worried that Snape's accusation of cowardice had stung Sirius so badly he might even now be planning some foolhardy trip beyond Grimmauld Place. Before he could think of what to say, however, Sirius had beckoned him to his side. I want you to take this,' he said quietly, thrusting a badly wrapped package roughly the size of a paperback book into Harry's hands. What is it? ' Harry asked. A way of letting me know if Snape's giving you a hard time. No, don't open it in here! ' said Sirius, with a wary look at Mrs. Weasley, who was trying to persuade the twins to wear hand-knitted mittens. I doubt Molly would approve-but I want you to use it if you need me, all right? 'OK,' said Harry, stowing the package away in the inside pocket of his jacket, but he knew he would never use whatever it was. It would not be he, Harry, who lured Sirius from his place of safety, no matter how foully Snape treated him in their forthcoming Occlumency classes. Let's go, then,' said Sirius, clapping Harry on the shoulder and smiling grimly, and before Harry could say anything else, they were heading upstairs, stopping before the heavily chained and bolted front door, surrounded by Weasleys. Goodbye, Harry, take care,' said Mrs. Weasley, hugging him. See you, Harry, and keep an eye out for snakes for me! ' said Mr. Weasley genially, shaking his hand. Right-yeah,' said Harry distractedly; it was his last chance to tell Sirius to be careful; he turned, looked into his godfather's face and opened his mouth to speak, but before he could do so Sirius was giving him a brief, one-armed hug, and saying gruffly, Look after yourself, Harry. ' Next moment, Harry found himself being shunted out into the icy winter air, with Tonks (today heavily disguised as a tall, tweedy woman with iron-grey hair) chivvying him down the steps. The door of number twelve slammed shut behind them. They followed Lupin down the front steps. As he reached the pavement, Harry looked round. Number twelve was shrinking rapidly as those on either side of it stretched sideways, squeezing it out of sight. One blink later, it had gone. Come on, the quicker we get on the bus the better,' said Tonks, and Harry thought there was nervousness in the glance she threw around the square. Lupin flung out his right arm. BANG. A violently purple, triple-decker bus had appeared out of thin air in front of them, narrowly avoiding the nearest lamppost, which jumped backwards out of its way. A thin, pimply, jug-eared youth in a purple uniform leapt down on to the pavement and said, Welcome to the-'Yes, yes, we know, thank you,' said Tonks swiftly. On, on, get on-' And she shoved Harry forwards towards the steps, past the conductor, who goggled at Harry as he passed. ' Ere-it's Arry-! 'If you shout his name I will curse you into oblivion,' muttered Tonks menacingly, now shunting Ginny and Hermione forwards. I've always wanted to go on this thing,' said Ron happily, joining Harry on board and looking around. It had been evening the last time Harry had travelled by Knight Bus and its three decks had been full of brass bedsteads. Now, in the early morning, it was crammed with an assortment of mismatched chairs grouped haphazardly around windows. Some of these appeared to have fallen over when the bus stopped abruptly in Grimmauld Place; a few witches and wizards were still getting to their feet, grumbling, and somebody's shopping bag had slid the length of the bus: an unpleasant mixture of frogspawn, cockroaches and custard creams was scattered all over the floor. Looks like we'll have to split up,' said Tonks briskly, looking a. round for empty chairs. Fred, George and Ginny, if you just take those seats at the back . . . Remus can stay with you. 'She, Harry, Ron and Hermione proceeded up to the very top deck, where there were two unoccupied chairs at the very front of the bus and two at the back. Stan Shunpike, the conductor, followed Harry and Ron eagerly to the back. Heads turned as Harry passed and, when he sat down, he saw all the faces flick back to the front again. As Harry and Ron handed Stan eleven Sickles each, the bus set off again, swaying ominously. It rumbled around Grimmauld Place, weaving on and off the pavement, then, with another tremendous BANG, they were al flung backwards; Ron's chair toppled right over and Pigwidgeon, who had been on his lap, burst out of his cage and flew twittering wildly up to the front of the bus where he fluttered down on to Hermione's shoulder instead. Harry, who had narrowly avoided falling by seizing a candle bracket, looked out of the window: they were now speeding down what appeared to be a motorway. Just outside Birmingham,' said Stan happily, answering Harry's unasked question as Ron struggled up from the floor. You keepin' well, then, Arry? I seen your name in the paper loads over the summer, but it weren't never nuffink very nice. I said to Ern, I said, e didn't seem like a nutter when we met im, just goes to show, dunnit? 'He handed over their tickets and continued to gaze, enthralled, at Harry. Apparently, Stan did not care how nutty somebody was, if they were famous enough to be in the paper. The Knight Bus swayed alarmingly, overtaking a line of cars on the inside. Looking towards the front of the bus, Harry saw Hermione cover her eyes with her hands, Pigwidgeon swaying happily on her shoulder. BANG. Chairs slid backwards again as the Knight Bus jumped from the Birmingham motorway to a quiet country lane full of hairpin bends. Hedgerows on either side of the road were leaping out of their way as they mounted the verges. From here they moved to a main street in the middle of a busy town, then to a viaduct surrounded by tall hills, then to a windswept road between high-rise flats, each time with a loud BANG. I've changed my mind,' muttered Ron, picking himself up from the floor for the sixth time, I never want to ride on this thing again. 'Listen, it's Ogwarts stop after this,' said Stan brightly, swaying towards them. That bossy woman up front oo got on with you, she's given us a little tip to move you up the queue. We're just gonna let Madam Marsh off first, though-there was a retching sound from downstairs, followed by a horrible spattering noise- she's not feeling er best. 'A few minutes later, the Knight Bus screeched to a halt outside a small pub, which squeezed itself out of the way to avoid a collision. They could hear Stan ushering the unfortunate Madam Marsh out of the bus and the relieved murmurings of her fellow passengers on the second deck. The bus moved on again, gathering speed, until-BANG. They were rolling through a snowy Hogsmeade. Harry caught a glimpse of the Hog's Head down its side street, the severed boar's head sign creaking in the wintry wind. Flecks of snow hit the large window at the front of the bus. At last they rolled to a halt outside the gates to Hogwarts. Lupin and Tonks helped them off the bus with their luggage, then got off to say goodbye. Harry glanced up at the three decks of the Knight Bus and saw all the passengers staring down at them, noses flat against the windows. You'll be safe once you're in the grounds,' said Tonks, casting a careful eye around at the deserted road. Have a good term, OK? 'Look after yourselves,' said Lupin, shaking hands all round and reaching Harry last. And listen . . . ' he lowered his voice while the rest of them exchanged last-minute goodbyes with Tonks, Harry, I know you don't like Snape, but he is a superb Occlumens and we all-Sirius included-want you to learn to protect yourself, so work hard, all right? 'Yeah, all right,' said Harry heavily, looking up into Lupin's prematurely lined face. See you, then. 'The six of them struggled up the slippery drive towards the castle, dragging their trunks. Hermione was already talking about knitting a few elf hats before bedtime. Harry glanced back when they reached the oaken front doors; the Knight Bus had already gone and he half-wished, given what was coming the following evening, that he was still on board. Harry spent most of the next day dreading the evening. His morning double-Potions lesson did nothing to dispel his trepidation, as Snape was as unpleasant as ever. His mood was further lowered by the DA members constantly approaching him in the corridors between classes, asking hopefully if there would be a meeting that night. I'll let you know in the usual way when the next one is,' Harry said over and over again, but I can't do it tonight, I've got to go to-er-remedial Potions. 'You take remedial Potions? ' asked Zacharias Smith superciliously, having cornered Harry in the Entrance Hall after lunch. Good Lord, you must be terrible. Snape doesn't usually give extra lessons, does he? 'As Smith strode away in an annoyingly buoyant fashion, Ron glared after him. Shall I jinx him? I can still get him from here,' he said, raising his wand and taking aim between Smith's shoulder blades. Forget it,' said Harry dismally. It's what everyone's going to think, isn't it? That I'm really stup-'Hi, Harry,' said a voice behind him. He turned round and found Cho standing there. Oh,' said Harry as his stomach leapt uncomfortably. Hi. 'We'll be in the library, Harry,' said Hermione firmly as she seized Ron above the elbow and dragged him off towards the marble staircase. Had a good Christmas? ' asked Cho. Yeah, not bad,' said Harry. Mine was pretty quiet,' said Cho. For some reason, she was looking rather embarrassed. Erm . . . there's another Hogsmeade trip next month, did you see the notice? 'What? Oh, no, I haven't checked the noticeboard since I got back. 'Yes, it's on Valentines Day . . . 'Right,' said Harry, wondering why she was telling him this. Well, I suppose you want to- ? 'Only if you do,' she said eagerly. Harry stared. He had been about to say, I suppose you want to know when the next DA meeting is? ' but her response did not seem to fit. I-er-' he said. Oh, it's OK if you don't,' she said, looking mortified. Don't worry. I-I'll see you around. 'She walked away. Harry stood staring after her, his brain working frantically. Then something clunked into place. Cho! Hey-CHO! 'He ran after her, catching her halfway up the marble staircase. Er-d'you want to come into Hogsmeade with me on Valentine's Day? 'Oooh, yes! ' she said, blushing crimson and beaming at him. Right . . . well . . . that's settled then,' said Harry, and feeling that the day was not going to be a complete loss after all, he virtually bounced off to the library to pick up Ron and Hermione before their afternoon lessons. By six o'clock that evening, however, even the glow of having successfully asked out Cho Chang could not lighten the ominous feelings that intensified with every step Harry took towards Snape's office. He paused outside the door when he reached it, wishing he were almost anywhere else, then, taking a deep breath, he knocked and entered. The shadowy room was lined with shelves bearing hundreds of glass jars in which slimy bits of animals and plants were suspended in variously coloured potions. In one corner stood the cupboard full of ingredients that Snape had once accused Harry-not without reason-of robbing. Harry's attention was drawn towards the desk, however, where a shallow stone basin engraved with runes and symbols lay in a pool of candlelight. Harry recognised it at once-it was Dumbledore's Pensieve. Wondering what on earth it was doing there, he jumped when Snape's cold voice came out of the shadows. Shut the door behind you, Potter. 'Harry did as he was told, with the horrible feeling that he was imprisoning himself. When he turned back into the room, Snape had moved into the light and was pointing silently at the chair opposite his desk. Harry sat down and so did Snape, his cold black eyes fixed unblinkingly upon Harry, dislike etched in every line of his face. Well, Potter, you know why you are here,' he said. The Headmaster has asked me to teachyou Occlumency. I can only hope that you prove more adept at it than at Potions. 'Right,' said Harry tersely. This may not be an ordinary class, Potter,' said Snape, his eyes narrowed malevolently, but I am still your teacher and you will therefore call me sir or Professor at all times. 'Yes . . . sir,' said Harry. Snape continued to survey him through narrowed eyes for a moment, then said, Now, Occlumency. As I told you back in your dear godfather's kitchen, this branch of magic seals the mind against magical intrusion and influence. 'And why does Professor Dumbledore think I need it, sir? ' said Harry looking directly into Snape's eyes and wondering whether Snape would answer. Snape looked back at him for a moment and then said contemptuously, Surely even you could have worked that out by now, Potter? The Dark Lord is highly skilled at Legilimency -'What's that? Sir? 'It is the ability to extract feelings and memories from another person's mind-'He can read minds? ' said Harry quickly, his worst fears confirmed. You have no subtlety, Potter,' said Snape, his dark eyes glittering. You do not understand fine distinctions. It is one of the shortcomings that makes you such a lamentable potion-maker. 'Snape paused for a moment, apparently to savour the pleasure of insulting Harry, before continuing. Only Muggles talk of mind-reading". The mind is not a book, to be opened at will and examined at leisure. Thoughts are not etched on the inside of skulls, to be perused by any invader, the mind is a complex and many-layered thing, Potter- or at least, most minds are. ' He smirked. It is true, however, that those who have mastered Legilimency are able, under certain conditions, to delve into the minds of their victims and to interpret their findings correctly. The Dark Lord, for instance, almost always knows when somebody is lying to him. Only those skilled at Occlumency are able to shut down those feelings and memories that contradict the lie, and so can utter falsehoods in his presence without detection. 'Whatever Snape said, Legilimency sounded like mind-reading to Harry, and he didn't like the sound of it at all. So he could know what we're thinking right now? Sir? 'The Dark Lord is at a considerable distance and the walls and grounds of Hogwarts are guarded by many ancient spells and charms to ensure the bodily and mental safety of those who dwell within them,' said Snape. Time and space matter in magic, Potter. Eye contact is often essential to Legilimency. 'Well then, why do I have to learn Occlumency? 'Snape eyed Harry, tracing his mouth with one long, thin finger as he did so. The usual rules do not seem to apply with you, Potter. The curse that failed to kill you seems to have forged some kind of connection between you and the Dark Lord. The evidence suggests that at times, when your mind is most relaxed and vulnerable -when you are asleep, for instance-you are sharing the Dark Lord's thoughts and emotions. The Headmaster thinks it inadvisable for this to continue. He wishes me to teach you how to close your mind to the Dark Lord. 'Harry's heart was pumping fast again. None of this added up. But why does Professor Dumbledore want to stop it? ' he asked abruptly. I don't like it much, but it's been useful, hasn't it? I mean . . . I saw that snake attack Mr Weasley and if I hadn't, Professor Dumbledore wouldn't have been able to save him, would he? Sir? 'Snape stared at Harry for a few moments, still tracing his mouth with his finger. When he spoke again, it was slowly and deliberately, as though he weighed every word. It appears that the Dark Lord has been unaware of the connection between you and himself until very recently. Up till now it seems that you have been experiencing his emotions, and sharing his thoughts, without his being any the wiser. However, the vision you had shortly before Christmas-'The one with the snake and Mr. Weasley? 'Do not interrupt me, Potter,' said Snape in a dangerous voice. As I was saying, the vision you had shortly before Christmas represented such a powerful incursion upon the Dark Lord's thoughts-'I saw inside the snake's head, not his! 'I thought I just told you not to interrupt me, Potter? 'But Harry did not care if Snape was angry; at last he seemed to be getting to the bottom of this business; he had moved forwards in his chair so that, without realising it, he was perched on the very edge, tense as though poised for flight. How come I saw through the snake's eyes if it's Voldemort's thoughts I'm sharing? 'Do not say the Dark Lord's name! ' spat Snape. There was a nasty silence. They glared at each other across the Pensieve. Professor Dumbledore says his name. ' said Harry quietly. Dumbledore is an extremely powerful wizard,' Snape muttered. While he may feel secure enough to use the name . . . the rest of us . . . ' He rubbed his left forearm, apparently unconsciously, on the spot where Harry knew the Dark Mark was burned into his skin. I just wanted to know,' Harry began again, forcing his voice back to politeness, why-'You seem to have visited the snake's mind because that was where the Dark Lord was at that particular moment,' snarled Snape. He was possessing the snake at the time and so you dreamed you were inside it, too. 'And Vol-he- realised I was there? 'It seems so,' said Snape coolly. How do you know? ' said Harry urgently.Is this just Professor Dumbledore guessing, or- ? 'I told you,' said Snape, rigid in his chair, his eyes slits, to call me sir". Yes, sir,' said Harry impatiently, but how do you know-'? It is enough that we know,' said Snape repressively. The important point is that the Dark Lord is now aware that you are gaining access to his thoughts and feelings. He has also deduced that the process is likely to work in reverse; that is to say, he has realised that he might be able to access your thoughts and feelings in return-'And he might try and make me do things? ' asked Harry. Sir? ' he added hurriedly. He might,' said Snape, sounding cold and unconcerned. Which brings us back to Occlumency. 'Snape pulled out his wand from an inside pocket of his robes and Harry tensed in his chair, but Snape merely raised the wand to his temple and placed its tip into the greasy roots of his hair. When he withdrew it, some silvery substance came away, stretching from temple to wand like a thick gossamer strand, which broke as he pulled the wand away from it and fell gracefully into the Pensieve, where it swirled silvery-white, neither gas nor liquid. Twice more, Snape raised the wand to his temple and deposited the silvery substance into the stone basin, then, without offering any explanation of his behaviour, he picked up the Pensieve carefully, removed it to a shelf out of their way and returned to face Harry with his wand held at the ready. Stand up and take out your wand, Potter. 'Harry got to his feet, feeling nervous. They faced each other with the desk between them.You may use your wand to attempt to disarm me, or defend yourself in any other way you can think of,' said Snape. And what are you going to do? ' Harry asked, eyeing Snape's wand apprehensively. I am about to attempt to break into your mind,' said Snape softly. We are going to see how well you resist. I have been told that you have already shown aptitude at resisting the Imperius Curse. You will find that similar powers are needed for this . . . brace yourself, now. Legilimens! 'Snape had struck before Harry was ready, before he had even begun to summon any force of resistance. The office swam in front of his eyes and vanished; image after image was racing through his mind like a flickering film so vivid it blinded him to his surroundings. He was five,watching Dudley riding a new red bicycle, and his heart was bursting with jealousy . . . he was nine, and Ripper the bulldog was chasing him up a tree and the Dursleys were laughing below on the lawn . . . he was sitting under the Sorting Hat, and it was telling him he would do well in Slytherin . . .Hermione was lying in the hospital wing, her face covered with thick black hair . . . a hundred dementors were closing in on him beside the dark lake . . . Cho Chang was drawing nearer to him under the mistletoe . . . No, said a voice inside Harry's head, as the memory of Cho drew nearer, you're not watching that, you're not watching it, it's private-He felt a sharp pain in his knee.Snape's office had come back into view and he realised that he had fallen to the floor; one of his knees had collided painfully with the leg of Snape's desk. He looked up at Snape, who had lowered his wand and was rubbing his wrist. There was an angry weal there, like a scorch mark. Did you mean to produce a Stinging Hex? ' asked Snape coolly. No,' said Harry bitterly, getting up from the floor. I thought not,' said Snape, watching him closely.