to the door of a broom closet; she opened it, pushed them inside among the buckets and mops, then slammed the door behind them.

"Ow," muttered Amelia as she fell over a bucket.

 "What -- how -- Hermione, what happened?"

 "We've gone back in time," Hermione whispered, lifting the chain off Harry's neck in the darkness. "Three hours back..." 

"Hermione!" Hissed Amelia, standing up. "Do you know how bad this is! We can't just mess with the space-time continuum! There are movies about why this is a bad idea!"

Harry found his own leg and gave it a very hard pinch. It hurt a lot, which seemed to rule out the possibility that he was having a very bizarre dream. 

"But --"

 "Shh! Listen! Someone's coming! I think -- I think it might be us!" Hermione had her ear pressed against the cupboard door. 

"Footsteps across the hall... yes, I think it's us going down to Hagrid's!"

 "Are you telling me," Harry whispered, "that we're here in this cupboard and we're out there too?"

 "Yes," said Hermione, her ear still glued to the cupboard door. "I'm sure it's us. It doesn't sound like more than four people... and we're walking slowly because we're under the Invisibility Cloak -- " 

She broke off, still listening intently.

 "We've gone down the front steps...." 

Hermione sat down on an upturned bucket, looking desperately anxious, but Harry wanted a few questions answered.

 "Where did you get that hourglass thing?"

 "It's called a Time-Turner," Hermione whispered, "and I got it from Professor McGonagall on our first day back. I've been using it all year to get to all my lessons. Professor McGonagall made me swear I wouldn't tell anyone. She had to write all sorts of letters to the Ministry of