heir Derivation". There will be no need to talk.' 

Still smiling her wide, self-satisfied smile, she sat down at her desk. The class gave an audible sigh as it turned, as one, to page nineteen. Harry wondered dully whether there were enough chapters in the book to keep them reading through all this year's lessons and was on the point of checking the contents page when he noticed that Hermione had her hand in the air again. 
Professor Umbridge had noticed, too, and what was more, she seemed to have worked out a strategy for just such an even-tuality. Instead of trying to pretend she had not noticed Hermione she got to her feet and walked around the front row of desks until they were face to face, then she bent down and whispered, so that the rest of the class could not hear, 'What is it this time, Miss Granger?' 

'I've already read Chapter Two,' said Hermione. 
'Well then, proceed to Chapter Three.' 

'I've read that too. I've read the whole book.' 

Professor Umbndge blinked but recovered her poise almost instantly. 
'Well, then, you should be able to tell me what Slinkhard says about counter-jinxes in Chapter Fifteen.' 

'He says that counter-jinxes are improperly named,' said Hermione promptly. 'He says "counter-jinx" is just a name people give their jinxes when they want to make them sound more acceptable.' 

Professor Umbridge raised her eyebrows and Harry knew she was impressed, against her will. 
'But I disagree,' Hermione continued. 
Professor Umbridge's eyebrows rose a little higher and her gaze became distinctly colder. 
'You disagree?' she repeated. 
'Yes, I do,' said Hermione, who, unlike Umbridge, was not whispering, but speaking in a clear, carrying voice that had by now attracted the attention of the rest of the class. 'Mr Slinkhard doesn't like jinxes, does he? But I think they can be very use-ful when they're used defensively.' 

'Oh, you do, do you?' said Professor Umbridge, forgetting to whisper and straightening up. 'Well, I'm afraid it is Mr Slink-hard's opinion, and not yours, that matters within this classroom, Miss Granger.' 

'But -' Hermione began. 
That is enough,' said Professor Umbridge. She walked back to the front of the class and stood before them, all the jaunti-ness she had shown at the beginning of the lesson gone. 'Miss Granger, I am going to take five points from Gryffindor house.' 

There was an outbreak of muttering at this.: 

'What for?' said Harry angrily. 
'Don't you get involved!' Hermione whispered urgently to him. 
'For disrupting my class with pointless interruptions,' said Professor Umbridge smoothly. 'I am here to teach you using a Ministry-approved method that does not include inviting students to give their opinions on matters about which they under-stand very little. Your previous teachers in this subject may have allowed you more licence, but as none of them - with the pos-sible exception of Professor Quirrell, who did at least appear to have restricted himself to age-appropriate subjects - would have passed a Ministry inspection -' 

'Yeah, Quirrell was a great teacher,' said Harry loudly, 'there was just that minor drawback of him having Lord Voldemort sticking out of the back of his head.' 

This pronouncement was followed by one of the loudest silences Harry had ever heard. Then - 

'I think another week's detentions would do you some good, Mr Potter,' said Umbridge sleekly. 

* * * 

The cut on the back of Harry's hand had barely healed and, by the following morning, it was bleeding again. He did not complain during the evening's detention; he was determined not to give Umbridge the satisfaction; over and over again he wrote I must not tell lies and not a sound escaped his lips, though the cut deepened with every letter. 
The very worst part of this second week's worth of detentions was, just as George had predicted, Angelinas reaction. She cornered him just as he arrived at the Gryffindor table for breakfast on Tuesday and shouted so loudly that Professor McGona-gall came sweeping down upon the pair of them from the staff table. 
'Miss Johnson, how dare you make such a racket in the Great Hall! Five points from Gryffindor!' 

'But Professor - he's gone and landed himself in detention again - 

'What's this, Potter?' said Professor McGonagall sharply, rounding on Harry. 'Detention? From whom?' 

'From Professor Umbridge,' muttered Harry, not meeting Professor McGonagall's beady, square-framed eyes. 
'Are you telling me,' she said, lowering her voice so that the group of curious Ravenclaws behind them could not hear, 'that after the warning I gave you last Monday you lost your temper in Professor Umbridge's class again?' 

'Yes,' Harry muttered, speaking to the floor. 
'Potter, you must get a grip on yourself! You are heading for serious trouble! Another five points from Gryffindor!' 

'But - what -? Professor, no!' Harry said, furious at this injustice, 'I'm already being punished by her, why do you have to take points as well?' 

'Because detentions do not appear to have any effect on you whatsoever!' said Professor McGonagall tartly. 'No, not an-other word of complaint, Potter! And as for you, Miss Johnson, you will confine your shouting matches to the Quidditch pitch in future or risk losing the team captaincy!' 

Professor McGonagall strode back towards the staff table. Angelina gave Harry a look of deepest disgust and stalked away, upon which he flung himself on to the bench beside Ron, fuming. 
'She's taken points off Gryffindor because I'm having my hand sliced open every night! How is that fair, how?' 

'I know, mate,' said Ron sympathetically, tipping bacon on to Harry's plate, 'she's bang out of order.' 

Hermione, however, merely rustled the pages of her Daily Prophet and said nothing. 
'You think McGonagall was right, do you?' said Harry angrily to the picture of Cornelius Fudge obscuring Hermione's face. 
'I wish she hadn't taken points from you, but I think she's right to warn you not to lose your temper with Umbridge,' said Hermione's voice, while Fudge gesticulated forcefully from the front page, clearly giving some kind of speech. 
Harry did not speak to Hermione all through Charms, but when they entered Transfiguration he forgot about being cross with her. Professor Umbridge and her clipboard were sitting in a corner and the sight of her drove the memory of breakfast right out of his head. 
'Excellent,' whispered Ron, as they sat down in their usual seats. 'Let's see Umbridge get what she deserves.' 

Professor McGonagall marched into the room without giving the slightest indication that she knew Professor Umbridge was there. 
That will do,' she said and silence fell immediately. 'Mr Finnigan, kindly come here and hand back the homework - Miss Brown, please take this box of mice - don't be silly, girl, they won't hurt you - and hand one to each student -' 

'Hem, hem,' said Professor Umbridge, employing the same silly little cough she had used to interrupt Dumbledore on the first night of term. Professor McGonagall ignored her. Seamus handed back Harry's essay; Harry took it without looking at him and saw, to his relief, that he had managed an 'A'. 
'Right then, everyone, listen closely - Dean Thomas, if you do that to the mouse again I shall put you in detention - most of you have now successfully Vanished your snails and even those who were left with a certain amount of shell have got the gist of the spell. Today, we shall be -' 

'Hem, hem,' said Professor Umbridge. 
'Yes?' said Professor McGonagall, turning round, her eyebrows so close together they seemed to form one long, severe line. 
'I was just wondering, Professor, whether you received my note telling you of the date and time of your inspec-' 

'Obviously I received it, or I would have asked you what you are doing in my classroom,' said Professor McGonagall, turn-ing her back firmly on Professor Umbridge. Many of the students exchanged looks of glee. 'As I was saying: today, we shall be practising the altogether more difficult Vanishment of mice. Now, the Vanishing Spell -' 

'Hem, hem.' 

'I wonder,' said Professor McGonagall in cold fury, turning on Professor Umbridge, 'how you expect to gain an idea of my usual teaching methods if you continue to interrupt me? You see, I do not generally permit people to talk when I am talking.' 

Professor Umbridge looked as though she had just been slapped in the face. She did not speak, but straightened the parch-ment on her clipboard and began scribbling furiously. 
Looking supremely unconcerned, Professor McGonagall addressed the class once more. 
'As I was saying: the Vanishing Spell becomes more difficult with the complexity of the animal to be Vanished. The snail, as an invertebrate, does not present much of a challenge; the mouse, as a mammal, offers a much greater one. This is not, therefore, magic you can accomplish with your mind on your dinner. So - you know the incantation, let me see what you can do:' 

'How she can lecture me about not losing my temper with Umbridge!' Harry muttered to Ron under his breath, but he was grinning - his anger with Professor McGonagall had quite evaporated. 
Professor Umbridge did not follow Professor McGonagall around the class as she had followed Professor Trelawney; per-haps she realised Professor McGonagall would not permit it. She did, however, take many more notes while sitting in her cor-ner, and when Professor McGonagall finally told them all to pack away, she rose with a grim expression on her face. 
'Well, it's a start,' said Ron, holding up a long wriggling mouse-tail and dropping it back into the box Lavender was passing around. 
As they filed out of the classroom, Harry saw Professor Umbridge approach the teacher's desk; he nudged Ron, who nudged Hermione in turn, and the three of them deliberately fell back to eavesdrop. 
'How long have you been teaching at Hogwarts?' Professor Umbridge a