‘Oh, yeah,’ said Ron, with a look of dawning comprehension.

Harry snorted. He walked around the room again, looking anywhere but at Ron and Hermione. ‘So, what have you two been doing, if you're not allowed in meetings?’ he demanded. ‘You said you'd been busy.’

‘We have,’ said Hermione quickly. ‘We've been decontaminating this house, it's been empty for ages and stuff's been breeding in here. We've managed to clean out the kitchen, most of the bedrooms and I think we're doing the drawing room tomo—AARGH!’

With two loud cracks, Fred and George, Ron's elder twin brothers, had materialised out of thin air in the middle of the room. Pigwidgeon twittered more wildly than ever and zoomed off to join Hedwig on top of the wardrobe.

‘Stop doing that!’ Hermione said weakly to the twins, who were as vividly red-haired as Ron, though stockier and slightly shorter.

‘Hello, Harry’ said George, beaming at him. ‘We thought we heard your dulcet tones.’

‘You don't want to bottle up your anger like that, Harry, let it all out,’ said Fred, also beaming. ‘There might be a couple of people fifty miles away who didn't hear you.’

‘You two passed your Apparation tests, then?’ asked Harry grumpily.

‘With distinction,’ said Fred, who was holding what looked like a piece of very long, flesh-coloured string.

‘It would have taken you about thirty seconds longer to walk down the stairs,’ said Ron.

‘Time is Galleons, little brother,’ said Fred. ‘Anyway, Harry, you're interfering with reception. Extendable Ears,’ he added in response to Harry's raised eyebrows, and held up the string which Harry now saw was trailing out on to the landing. ‘We're trying to hear what's going on downstairs.’

‘You want to be careful,’ said Ron, staring at the Ear, ‘if Mum sees one of them again...’

‘It's worth the risk, that's a major meeting they're having,’ said Fred.

The door opened and a long mane of red hair appeared.

‘Oh, hello, Harry!’ said Ron's younger sister, Ginny, brightly. ‘I thought I heard your voice.’

Turning to Fred and George, she said, ‘It's no-go with the Extendable Ears, she's gone and put an Imperturbable Charm on the kitchen door.’

‘How d'you know?’ said George, looking crestfallen.

‘Tonks told me how to find out,’ said Ginny. ‘You just chuck stuff at the door and if it can't make contact the door's been Imperturbed. I've been flicking Dungbombs at it from the top of the stairs and they just soar away from it, so there's no way the Extendable Ears will be able to get under the gap.’

Fred heaved a deep sigh.

‘Shame. I really fancied finding out what old Snape's been up to.’

‘Snape!’ said Harry quickly. ‘Is he here?’

‘Yeah,’ said George, carefully closing the door and sitting down on one of the beds; Fred and Ginny followed. ‘Giving a report. Top secret.’

‘Git,’ said Fred idly.

‘He's on our side now,’ said Hermione reprovingly.

Ron snorted. ‘Doesn't stop him being a git. The way he looks at us when he sees us....’

‘Bill doesn't like him, either,’ said Ginny, as though that settled the matter.