‘Yes, but still,’ said Hermione

‘Yes, but still,’ said Hermione, with an air of explaining something very simple to somebody very obtuse, ‘even if you do cause a diversion, how is Harry supposed to talk to him?’

‘Umbridge's office,’ said Harry quietly.

He had been thinking about it for a fortnight and could come up with no alternative. Umbridge herself had told him that the only fire that was not being watched was her own.

‘Are—you— insane?’ said Hermione in a hushed voice.

Ron had lowered his leaflet on jobs in the Cultivated Fungus Trade and was watching the conversation warily.

‘I don't think so,’ said Harry, shrugging.

‘And how are you going to get in there in the first place?’

Harry was ready for this question.

‘Sirius's knife,’ he said.

‘Excuse me?’

‘Christmas before last Sirius gave me a knife that'll open any lock,’ said Harry. ‘So even if she's bewitched the door so Alahomora won't work, which I bet she has— ’

‘What do you think about this?’ Hermione demanded of Ron, and Harry was reminded irresistibly of Mrs. Weasley appealing to her husband during Harry's first dinner in Grimmauld Place.

‘I dunno,’ said Ron, looking alarmed at being asked to give an opinion. ‘If Harry wants to do it, it's up to him, isn't it?’

‘Spoken like a true friend and Weasley,’ said Fred, clapping Ron hard on the back. ‘Right, then. We're thinking of doing it tomorrow, just after lessons, because it should cause maximum impact in everybody's in the corridors—Harry, we'll set it off in the east wing somewhere, draw her right away from her own office—I reckon we should be able to guarantee you, what, twenty minutes?’ he said, looking at George.

‘Easy,’ said George.

‘What sort of diversion is it?’ asked Ron.

‘You'll see, little bro', said Fred, as he and George got up again. ‘At least, you will if you trot along to Gregory the Smarmy's corridor round about five o'clock tomorrow.’

Harry awoke very early the next day, feeling almost as anxious as he had done on the morning of his disciplinary hearing at the Ministry of Magic. It was not only the prospect of breaking into Umbridge's office and using her fire to speak to Sirius that was making him feel nervous, though that was certainly bad enough; today also happened to be the first time Harry would be in close proximity to Snape since Snape had thrown him out of his office.

After lying in bed for a while thinking about the day ahead, Harry got up very quietly and moved across to the window beside Neville's bed, and stared out on a truly glorious morning. The sky was a clear, misty, opalescent blue. Directly ahead of him, Harry could see the towering beech tree below which his father had once tormented Snape. He was not sure what Sirius could possibly say to him that would make up for what he had seen in the Pensieve, but he was desperate to hear Sirius's own account of what had happened, to know of any mitigating factors there might have been, any excuse at all for his father's behaviour ...

Something caught Harry's attention: movement on the edge of the Forbidden Forest. Harry squinted into the sun and saw Hagrid emerging from between the trees. He seemed to be limping. As Harry watched, Hagrid staggered to the door of his cabin and disappeared inside it. Harry watched the cabin for several minutes. Hagrid did not emerge again, but smoke furled from the chimney, so Hagrid could not be so badly injured that he was unequal to stoking the fire.

Harry turned away from the window, headed back to his trunk and started to dress.

With the prospect of forcing entry into Umbridge's office ahead. Harry had never expected the day to be a restful one, but he had not reckoned on Hermione's almost continual attempts to dissuade him from what he was planning to do at five o'clock. For the first time ever, she was at least as inattentive to Professor Binns in History of Magic as Harry and Ron were, keeping up a stream of whispered admonitions that Harry tried very hard to ignore.

‘... and if she does catch you there, apart from being expelled, she'll be able to guess you've been talking to Snuffles and this time I expect she'll force you to drink Veritaserum and answer her questions ...’

‘Hermione,’ said Ron in a low and indignant voice, ‘are you going to stop telling Harry off and listen to Binns, or am I going to have to take my own notes?’

‘You take notes for a change, it won't kill you!’

By the time they reached the dungeons, neither Harry nor Ron was speaking to Hermione. Undeterred, she took advantage of their silence to maintain an uninterrupted flow of dire warnings, all uttered under her breath in a vehement hiss that caused Seamus to waste five whole minutes checking his cauldron for leaks.