He had been thinking about the Christmas event since the morning after Halloween.
Not because he had planned it that way — the timing had been determined by the fact that Halloween had produced The Witness as an identity and The Witness, having been established, required maintenance. A single event was a mystery. Two events were a tradition. He had understood this from the first morning the cards had been on the notice boards, from the moment he had raised his pumpkin juice at Dumbledore and Dumbledore had raised his goblet back.
The castle had been given something. The castle was going to expect more. He was going to give it more.
The question had been: what.
The Halloween event had been beautiful and strange and historically specific — the specific register of something that had treated its audience as people who deserved to be given something real and particular. He was not going to repeat it. The Christmas prank needed to be different in character. Not because Halloween had been the wrong approach — it had been exactly the right approach for Halloween. But Christmas was a different occasion, and the occasions he had thought about most carefully since September were the ones where the response to a large thing had failed to match the character of the thing itself.
Halloween required reverence. Christmas required something else.
He had arrived at the answer on a Tuesday evening in the second week of December, in the specific way that answers arrived when you had been not-thinking about a problem long enough that your subconscious had finished its work and was ready to report back. He had been making a second dashi — more confident now, the temperature management intuitive in the way that things became intuitive after the fifth repetition — and the older elf had been at the far end of the kitchen when the answer arrived, and it had arrived complete, which was always a good sign.
The suits of armour.
Hogwarts had forty-seven suits of armour. He had counted them in October during a late-night walk when he was working off the restlessness of a difficult day, and had noted them in the way he noted everything — with the attention of someone who catalogued what was around him because he did not know in advance what would be useful. Forty-seven suits of armour, distributed across the castle's corridors and staircases and great halls, each one standing in the specific patient stillness of something that had been standing in that specific spot for a very long time and had developed no anxieties about it.
The suits of armour could sing.
He had read this in Hogwarts: A History — a footnote in the chapter on the castle's enchanted fixtures, noting that the armour had been briefly animated during the 1612 Goblin Rebellion to assist in the castle's defense, and that the enchantment had been modified in the following century to include a choral function for ceremonial occasions. The choral enchantment had fallen out of use sometime in the 1800s, had never been formally removed, and remained technically active though no one had triggered it in living memory.
He spent three evenings in the library finding the activation sequence. It was in a footnote of a footnote, in a text from 1743 that had the specific dusty confidence of something that had not been read in its intended context for approximately two hundred years. The sequence was runic — of course it was runic, everything in this castle that was not actively maintained had been built on runes — and it was not complicated, which was either because the original enchanter had been very good or because choir conductors in 1743 had needed to activate it quickly and had designed accordingly.
He read the sequence and thought about the character of the occasion and felt the particular pleasure of something fitting — a sequence that landed.
The second component was the absurdist element, which he had thought about more carefully than the singing. The singing alone was ceremonial. He did not want ceremonial. He wanted something that was both fully committed and fully ridiculous, that treated its own absurdity seriously, that produced laughter from people who had also been moved and who found the combination unexpected.
He needed a song.
The song he chose took him forty-five minutes of genuine deliberation, which was longer than he usually spent on anything that was not the Ravenclaw book or the compound runic grammar. He went through his mental catalogue of everything he had ever encountered that was simultaneously very seriously performed and objectively ridiculous, and arrived, at the end of forty-five minutes, at a conclusion that was so completely correct that he sat with it for a moment in simple satisfaction before writing it down.
He brought the plan to the kitchen on the second Saturday of December.
Not to the older elf, specifically — he had learned that the kitchens functioned as a collective in the specific way that communities with deep shared purpose functioned, and that bringing something to one of them was bringing it to the room. He had also learned that the room had opinions, which it expressed through the quality of its attention, and that the quality of its attention was a reliable guide to whether an idea was good.
He laid out the plan on the worksurface beside the dashi materials. The runic sequence for the choral activation. The specific song selection, written out with the notation for which suits were to carry which part. The timing — the Christmas feast, after the main course, the moment when the hall was fullest and warmest and most completely itself. The logistics: he would not be there. He was going home for Christmas. The elves would execute it.
"We are being asked," the older elf said, reading the sequence with the focused attention of someone fluent in the tradition, "to conduct a choir of forty-seven suits of armor."
"Yes," he said.
"Of armour that has not been activated in two centuries."
"The enchantment is technically active," he said. "The sequence will work. I've tested it on the suit on the fifth floor landing — very briefly, just the first rune, to confirm the activation takes." He paused. "It gripped its own sword quite vigorously. I took that as a positive sign."
The older elf looked at the song selection.
The song was, technically, a Christmas carol. It had the structure of a Christmas carol, the meter of a Christmas carol, the specific earnestness of performance that Christmas carols required. It was also, objectively and irreducibly, the Twelve Days of Christmas, in which the repetition accumulated the way music built when it had been designed by someone who had either a profound sense of humor or no sense of humor whatsoever, and the ambiguity of that question was one of the things that made it perfect.
Forty-seven suits of armor. Four-part choral arrangement. Full commitment. Every verse.
There was a long pause.
Then, from somewhere in the kitchen, a sound emerged that he had not heard from house elves before — not the professional quiet of a room at work, not the warm collective hum of a space that was comfortable. Something lighter. Something that had, if he was reading it correctly, the quality of amusement.
The older elf was not smiling. House elves did not smile in the way humans smiled. But her eyes had something in them that had not been there a moment ago.
"The fifth partridge," she said, "will need help with the syncopation."
"The arrangement accounts for that," he said. "The suits on the Entrance Hall staircase carry the lead line. The corridor suits are primarily harmonic."
She looked at the arrangement. She made one adjustment — a slight redistribution of the lower voices between the suits on the second floor landing, which he reviewed and accepted immediately because it was correct and she had been listening to this castle's acoustics for longer than he had been alive. Then she folded the parchment with the precise care of someone treating a document they intended to execute properly.
"The cards," he said. "One on each notice board, same as before. After the armour stops."
He produced the stack. Cream-coloured, precisely cut, eleven words in the unfamiliar hand, the golden eye mark beneath.
This time he had added one line below the symbol. Just one.
He pushed the stack across the worksurface.
She read the addition.
Another pause. Then, from the kitchen, the sound again — lighter than before, more present.
"On the fifth day of Christmas," the older elf said, with the specific gravity of someone delivering something straight-faced, "The Witness sent to thee."
"Exactly," he said.
She took the cards.