The door pushed open easily and a horrible smell came into contact with Rosalyn's nose. She was sure the others felt it too, due to the gagging. She hauled her robes over her nose and saw what was making the awful smell.

A troll, knocked out with a bloody lump on its head, was lying in the middle of the room. It was even larger than the one they had fought in the girls' bathroom, and Rosalyn sighed in relief, she didn't know what would've happened if it had been conscious.

"I'm glad we didn't have to fight that one," Rosalyn whispered, eyes watering.

"Come on, let's go," Harry said, feeling the same way, ushering his sister and Hermione away.

They reached the wooden door which Rosie and Harry pulled open respectively. "Must've been Quirrel's." Rosalyn choked as Snape's, the last one, came into view. Nothing in there was remotely frightening, just seven bottles standing in a line, and a piece of parchment next to them.

"What's this?" Hermione said, knitting her brows together.

"Let's see," Rosalyn said, stepping into the room, once her two other friends were through, a fire sprang up in the doorway, it was purple, and blocking the way. Another sprang up in the doorway leading them on. They were trapped.

And going to have to consult the bottles.

Hermione said, "I guess we'll have to read this," picking up the parchment. Rosalyn and Harry bent over her shoulder and the three read in silence.

Danger lies before you, while safety lies behind
Two of us will help you, whichever you would find
One among us seven will let you move ahead
The other will transport the drinker back instead
Two among out number hold only nettle wine
Three of us are killers, waiting hidden in line
Choose unless you wish, to stay here for ever more
To help you in your choice, we give you these clues four
First, however slyly, the poison tries to hide
You will always find some on nettle wine's left side;
Second, different are those who stand at either end
But if you would move onwards, neither is your friend;
Third, as you see clearly, all are different size,
Neither dwarf nor giant holds death in their insides;
Fourth, the second left and the second on the right,
Are twins once you taste them, though different at first sight.

Rosalyn groaned in defeat. They couldn't solve this! Grown adults would be pondering this, but not eleven year olds. But, to her great surprise, and Harry's too, Hermione sighed in relief and smiled.

"Great," she said, smiling. "A change of challenge! This isn't magic, it's logic! A lot of the greatest wizards haven't got an ounce of logic, they'd be stuck here for ages!"

"But so will we, won't we?" Harry and Rosalyn both said, knitting their brows together and pursing their lips.

"No," Hermione said, looking at the two of them. "No, of course not, everything we need is on this paper: seven bottles, three are poison, two are wine, one will get us through the fire in front of us, the black one, and one will get us back through the purple fire."

"But how do we know which ones to drink? If I planned to die tonight, it was by Voldemort, not by a miscalculated poison bottle," Rosalyn said.

Hermione, knowing Rosalyn wasn't intending to die tonight, said to the twins. "Give me a minute."

She needed more. She read the paper several times, paced up and down in front of the bottles, murmured to herself and pointed to them. She squeezed her eyes shut but her lips were still moving, but, finally, she clapped her hands.

"Got it, the smallest bottle'll take us through the black fire, towards the stone," Hermione said, not an ounce of doubt in her voice.

"There's only enough for two, maybe not even that," Harry mused, looking at the bottle.

The three looked at each other, fear in their faces, but also determination.

"Which one will get us back through the purple fire?" Harry asked.

Hermione pointed at a bottle on the right end of the line, Rosalyn swallowed, but she didn't just swallow her saliva, she swallowed her pride, her fear, and her burning sensation to turn back.

"You drink that," she said to Hermione, who looked shocked. "No, really. Go and get Ron, use the broom from the flying key room and get past the trapdoor and Fluffy. Go to the owlrey, write a letter to Dumbledore, explain what happened and tell him to come. Harry and I may be able to hold Snape off for a while, but really, we're no match for him."

"But- but what if You Know Who's with him?" Hermione asked.

"We got lucky once, didn't we?" Rosalyn said, smirking and showing Hermione her scarred forearm, along with Harry lifting his fringe to show her his lightning bolt. "Maybe we'll get lucky again."

Hermione's lip shuddered, and suddenly ran at the twins and threw her arms around them.

"Hermione!"

"Rosalyn, you're a great witch, and you're a great wizard, Harry, you know that?"

"I'm not nearly as good as you," Rosalyn said, Harry going very red. Hermione pulled away.

"Me?" Hermione asked in shock. "Books! Cleverness! Friendship and bravery are more important! Please be careful, you two!"

"You drink first," Rosalyn said, "You're sure which is which, right?"

"Positive." She took a wary swig from the said bottle that was meant to help her go back, it didn't seem to taste bad, as her face wasn't screwed up, but there was still a chance it was poison.

"It's not poison?" Harry checked, reading Rosalyn's mind.

"No, but it's like ice."

"Go before it wears off!"

"Good luck - take care - don't do anything stupi-"

"GO!" Both the twins shouted at her.

Hermione swiveled on her foot and walked straight through the purple flames. It's okay, she'll be alright, Rosalyn told herself, she's going to get Ron, and they're going to get Dumbledore, it's gonna be okay...

Rosalyn took a deep breath and turned to her twin, who had picked up the smallest bottle on the table. They both silently looked at the black flames.

"Here we go," Rosalyn said, her breathing shaky.

Harry said, "We'll be okay, Rosie, I promise."

She smiled at her brother. Even though lthey were facing potential death, she still was glad it was with the only remaining family she had left.

Harry sighed and said, "you ready?" to his sister, who nodded, Harry took a small sip and left the rest for Rosalyn, who downed it quickly.

As Hermione had said, it felt like ice was flowing through her body. She put the bottle down and joined hands with her twin, who was experiencing the same thing, they braced themselves, and walked through the fire together. The black flames were licking her body and she was stepping on the ash and soot, but she couldn't feel anything. And then the sensation left as soon as it had arrived and she was on the other side, in the other chamber, with Harry looking completely and utterly shocked.

And there was someone in the chamber. But it wasn't Snape, and it wasn't Voldemort, and it wasn't anyone that they had deemed suspicious the entire year.