The next morning, every notice board in the castle had a small card pinned to it.
The card was cream colored and precisely cut and contained eleven words in a neat, unfamiliar hand:
The castle remembers everyone who ever walked its halls. — The Witness
No other explanation. No claim of method.
A single identification mark. A luminous golden eye — an all-seeing eye rendered in fine metalwork lines, with radiating sunburst rays above it, the iris a soft circle of beaten gold, and a downward-pointing triangle suspended below like a plumb line or a pendant. It sits on a warm blush ground, the gold having the quality of something old and deliberate, like a seal pressed into wax. It looks less like a symbol invented and more like one remembered.
He had written them himself, the night before, in the Room, in handwriting that was not his own — a deliberate modification, slightly more formal, the letters more upright than his natural hand. He had delivered them at five in the morning with the specific efficiency of someone who had planned the delivery route in advance and had allowed himself thirty-five minutes for it.
He ate breakfast with the usual quality of someone who had nothing particular on his mind.
The castle spent the morning discussing The Cartographer with the dedicated energy of an institution that had been given a mystery and intended to pursue it properly. Theories moved through the common room across the day — a seventh-year, clearly, someone with advanced knowledge of runic projection; a ghost, somehow;
Dumbledore himself, though this was considered unlikely on the grounds that Dumbledore would have signed his name; Fred and George, which was the most popular theory and the one he considered most satisfying to allow to persist.
He said nothing.
He was The Witness and no one knew it and he found, eating lunch while the castle talked, that this was exactly the right amount.
McGonagall looked at the notice board in the corridor outside her classroom with the specific expression of someone reading a thing and running it against everything they knew. She did not look at any particular student.
Dumbledore, at the staff table, had the expression he had when he was thinking something that had several layers and was engaged with all of them. He looked, at one point during breakfast, at the Gryffindor table. His eyes moved across the third-years in the general way of a man surveying a room, and then, briefly, with a quality of attention that was not quite a look but was something more focused, before he returned to his porridge.
Ron ate his porridge.
Dumbledore said nothing. He would say nothing. Ron was entirely certain of this, in the way he was certain of the things he had assessed carefully — Dumbledore understood what the Witness had done and had decided it was the kind of thing worth leaving intact, because telling people the answer was always less interesting than letting them find it.
He raised his pumpkin juice, very slightly, in the direction of the staff table.
Dumbledore, looking up from his porridge, raised his goblet in acknowledgment.
There was one other thing he had not planned, which was the photographs.
He found them on his table inside the Room itself — not posted, simply left in a neat stack on the table nearest the door, which was the Room's way of indicating that something had been handled and he should be aware of it. A stack of photographs, wizard-quality, each one a different angle of the Great Hall during the four minutes. He did not know where the cameras had come from — somewhere in the Room's inventory, the accumulated objects of a thousand years of students who had needed a place to keep things. He did not know which of the house elves had thought to use them. He stood looking at the stack for a long moment, at the moving images of thirty luminous figures rising from the floor of the Great Hall while five hundred people went still, and then he took the stack to the workbench and made copies — careful copies, one set per elf who had helped, each set wrapped in a square of cloth he found in the Room's stores. He delivered them to the kitchen that same morning, before the cards, sliding each wrapped parcel onto the worksurface beside the older elf without ceremony. She looked at him. She looked at the parcels. She made no sound, but something in the quality of the kitchen's attention shifted in a way that had the character of a thing being recognized. He had no words for it that didn't feel insufficient, so he said nothing, and she said nothing, and that was exactly right.