The grimness on Albus Dumbledore's face lasted only an instant before giving way to bewilderment. "Quirinus? What -"

And then there was a pause.

"Well," said Albus Dumbledore. "I do feel stupid."

"I should hope so," Professor Quirrell said easily; if he had been at all shocked himself at being caught, it did not show. A casual wave of his hand changed his robes back to a Professor's clothing.

Dumbledore's grimness had returned and redoubled. "There I am, searching so hard for Voldemort's shade, never noticing that the Defense Professor of Hogwarts is a sickly, half-dead victim possessed by a spirit far more powerful than himself. I would call it senility, if so many others had not missed it as well."

"Quite," said Professor Quirrell. He lifted his eyebrows. "Really, am I that hard to recognise without the glowing red eyes?"

"Oh, yes indeed," Albus Dumbledore said in level tones. "Your acting was perfect; I confess myself utterly deceived. Quirinus Quirrell seemed - what is the term I am looking for? Ah yes, that is the word. He seemed sane."

Professor Quirrell chuckled; he looked for all the world as though the two of them were just having a casual conversation. "I never was insane, you know. Lord Voldemort was just another game for me, the same as Professor Quirrell."

Albus Dumbledore did not look like he was enjoying a casual chat. "I thought you might say that. I regret to inform you, Tom, that anyone who can bring himself to act the part of Voldemort is Voldemort."

"Ah," said Professor Quirrell, raising an admonishing finger. "There is a loophole in that reasoning, old man. Anyone who acts the part of Voldemort must be what moralists call 'evil', on this we agree. But perhaps the real me is completely, utterly, irredeemably evil in an interestingly different fashion from what I was pretending with Voldemort -"

"I find," Albus Dumbledore ground out, "that I do not care."

"Then you must think yourself to be rid of me very soon," said Professor Quirrell. "How interesting. My immortal existence must depend on discovering what trap you have set, and finding a way to escape from it, as soon as possible." Professor Quirrell paused. "But let us pointlessly delay to talk of other matters first. How did you come to be waiting inside the Mirror? I thought you would be elsewhere."

"I am there," Albus Dumbledore said, "and also inside the Mirror, unfortunately for you. I have always been here, all along."

"Ah," said Professor Quirrell, and sighed. "I suppose my little distraction was for naught, then."

And the rage of Albus Dumbledore was no longer leashed. "Distraction?" roared Dumbledore, his sapphire eyes tight with fury. "You killed Master Flamel for a distraction?"

Professor Quirrell looked dismayed. "I am wounded by the injustice of your accusation. I did not kill the one you know as Flamel. I simply commanded another to do so."

"How could you? Even you, how could you? He was the library of all our lore! Secrets you have forever lost to wizardry!"

There was an edge to Professor Quirrell's smile, now. "You know, I still do not comprehend how your twisted mind can consider it acceptable for Flamel to be immortal, but when I try for the same it makes me a monster."

"Master Flamel never descended into immortality! He -" Dumbledore choked. "He only stayed awake past his evening, for our sakes, through his long, long day -"

"I don't know if you recall this," Professor Quirrell said, his voice airy, "but do you recall that day in your office with Tom Riddle? The one where I begged you, where I went down on my knees and begged you, to introduce me to Nicholas Flamel so that I could ask to become his apprentice, to someday make for myself the Philosopher's Stone? That was my last attempt to be a good person, if you are curious. You told me no, and gave me a lecture on how unvirtuous it was to be afraid of death. I went from your office in bitterness and in fury. I reasoned that if I was to be called evil in any case, just for not wanting to die, then I might as well be evil; and one month later I killed Abigail Myrtle to pursue immortality by other means. Even when I knew more of Flamel, I remained quite put out with your hypocrisy; and for that reason I tormented you and yours more than I otherwise would have done. I have often felt that you ought to know this, but we never had a chance to talk frankly."

"I decline," said Albus Dumbledore, whose gaze did not waver. "I do not accept the tiniest shred of responsibility for what you have become. That was all, entirely, you and your own decisions."

"I am not surprised to hear you say that," said Professor Quirrell. "Well, now I am curious as to what responsibilities you do accept. You have access to some unusual power of Divination; that much I deduced long ago. You made too many nonsensical moves, and the paths by which they worked out in your favor were too ridiculous. So tell me. Were you forewarned of the result, that night of All Hallow's Eve when I was vanquished for a time?"

"I knew," said Albus Dumbledore, his voice low and cold. "For that, I accept responsibility, which is something you will never understand."

"You arranged for Severus Snape to hear the Prophecy that he brought to me."

"I allowed it to happen," said Albus Dumbledore.

"And there I was, all excited at having finally gained my own foreknowledge." Professor Quirrell shook his head as though in sadness. "So the great hero Dumbledore sacrificed his unwitting pawns, Lily and James Potter, merely to banish me for a few years."

Albus Dumbledore's eyes were like stones. "James and Lily would have gone willingly to the death, if they had known."

"And the little baby?" Professor Quirrell said. "Somehow I doubt the Potters would have been so eager to leave him in the path of You-Know-Who."

You could scarcely see the flinch. "The Boy-Who-Lived came out of it well enough. Tried to turn him into you, did you? Instead you turned yourself into a corpse, and Harry Potter became the wizard you should have been." Now there was something like the usual Dumbledore behind the half-moon glasses, a tiny twinkle in those eyes. "All of Tom Riddle's icy brilliance, tamed to the service of James and Lily's warmth and love. I wonder how you felt when you saw what Tom Riddle could have become, if he had grown up in a loving family?"

Professor Quirrell's lips quirked. "I was surprised, even shocked, by the abyssal depths of Mr. Potter's naivete."

"I suppose the humor of the situation would be lost on you." It was then, finally, that Albus Dumbledore smiled. "How I laughed when I realised it! When I saw you had made a Good Voldemort to oppose the evil one - ah, how I laughed! I never had the steel for my role, but Harry Potter shall be more than equal to it, when he comes into his power." Albus Dumbledore's smile disappeared. "Though I suppose Harry shall have to find some other Dark Lord to vanquish for it, since you will not be there."

"Ah, yes. That." Professor Quirrell made to walk away from the Mirrror, and seemed to halt just before reaching the point where the Mirror would no longer have reflected him, if it had been reflecting him. "Interesting."

Dumbledore's smile was colder, now. "No, Tom. You are not going anywhere."

Professor Quirrell nodded. "What have you done, exactly?"

"You have refused death," said Dumbledore, "and if I destroyed your body, your spirit would only wander back, like a dumb animal that cannot understand it is being sent away. So I am sending you outside Time, to a frozen instant from which neither I nor any other can return you. Perhaps Harry Potter will be able to retrieve you someday, if prophecy speaks true. He may wish to discuss with you just who is at fault for the deaths of his parents. For you it will only be an instant - if you ever return at all. Either way, Tom, I wish you the best of it."

"Hm," said Professor Quirrell. The Defense Professor had paced past where Harry stood, watching mute and with something like horror, only to halt again at the other edge of the mirror. "As I suspected. You are using Merlin's old method of sealing, what the tale of Topherius Chang names as the Process of the Timeless. If legend speaks true, not even you can stop the process, now that it has been in motion this long."

"Indeed," said Albus Dumbledore. But his eyes were suddenly wary.

And Harry, from where he stood just before and to the right of the door, waiting in silence and controlled terror, could feel it in the air; he could feel the sense of a presence gathering within the Mirror's field. Something more alien than magic, everything about it incomprehensible except for the fact of its strangeness and the fact of its power. It had been slow but now it was waxing faster, that presence.

"But you could still reverse the effect, if Chang's account is true," said Professor Quirrell. "Most powers of the Mirror are double-sided, according to legend. So you could banish what is on the other side of the Mirror instead. Send yourself, instead of me, into that frozen instant. If you wanted to, that is."

"And why would I do that?" Albus Dumbledore's voice was tight. "I suppose you are going to tell me that you have taken hostages? That was futile, Tom, you fool! You utter fool! You should have known that I would give you nothing for any hostages you had taken."

"You always were one step too slow," said Professor Quirrell. "Allow me to introduce you to my hostage."

Another presence invaded the air around Harry, a crawling sensation all over his flesh as another Tom Riddle's magic passed very close to his skin. The Cloak of Invisibility was torn away from him, and the shimmering black Cloak flew away from him, through the air.

Professor Quirrell caught it, and swiftly drew it over himself; in less than a second he had pulled down the Cloak's hood over his head, and disappeared.

Albus Dumbledore staggered, as though some essential support had been removed from him.

"Harry Potter," the Headmaster breathed. "What are you doing here?"

Harry stared at the image of Albus Dumbledore, on whose face utter shock and utter dismay were warring.

The guilt and the shame were too much, too much, hitting Harry all at once, and he could feel the incomprehensible presence around him rising to a peak. Harry knew without words that there was no time left, and that he was done.

"It's my fault," Harry said in a tiny voice, from whatever part of him had taken over his throat in the final extremity. "I was stupid. I've always been stupid. You mustn't rescue me. Goodbye."

"Why, look at that," sang out Professor Quirrell's voice from the empty air, "I don't seem to have a reflection any more."

"No," said Albus Dumbledore. "No, no, NO!"

Into the hand of the Albus Dumbledore flew from his sleeve his long, dark-grey wand, and in his other hand, as though from nowhere, appeared a short rod of dark stone.

Albus Dumbledore threw these both violently aside, just as the building sense of power rose to an unbearable peak, and then disappeared.

The Mirror returned to showing the ordinary reflection of a gold-lit room of white stone, without any trace of where Albus Dumbledore had been.

The next update will be on February 25th, 2015 at 10:30am Pacific / 6:30pm UTC.

This will be followed by another update on the same day at 1pm Pacific / 9:00pm UTC.

I have some inter-city traveling to do tomorrow, involving a train (hence the weird schedule).
Please do not panic if either update is late.