The former holders are not damaged. They work. They eat. They sleep. By every measure the Laboratory possesses, they are unchanged.
But they are gentle in a way they were not before. They handle objects as though the objects matter. They listen when spoken to with an attention that unsettles the speaker — the feeling of being heard completely by someone who is no longer entirely present.
They do not seek each other out. The Librarian finds this significant. People who have survived the same thing tend to gather. The former holders do not. They move through the Laboratory alone, and when two of them pass in a corridor they do not acknowledge each other, and the Librarian does not know if this is because they have nothing to say or because what they share cannot be reduced to greeting.
One former holder — a mason, steady-handed, known for her work — was found sitting in an empty corridor with her tools beside her, untouched. She was not distressed. When asked what she was doing, she said she was listening. When asked to what, she said she did not know anymore. She said she used to know. She said it was the most beautiful thing she had ever heard and now there was just the corridor and the pumps and her own breathing and none of it was enough.
She went back to work. Her cuts were clean. Her foreman noted no change in quality.
Three of the earliest holders left the Laboratory. They did not say where they were going. They did not pack supplies. They walked into the void with nothing and no one stopped them because no one understood, until later, that they were not coming back.
The Librarian searched for their names. She found them in records predating the Song. She did not find them in any record after.
Entry 3,407, final annotation.
"I have asked the Guardian whether he hears anything when the archive is quiet. He does not answer questions that assume he shares my senses.
The Song is still moving. I cannot track it. I do not know who holds it now. I know only that it has not stopped — the holders, when they surface, are always recent. The pressure behind the sternum is always fresh. It has been moving through the Laboratory for longer than most of the people in it have been alive, and it is exactly as strong as the day the calibration crew folded the edge of something they should have left alone.
Fourteen names were present at the aperture during the week the work was extended. Eleven appear in later records. Three do not.
I do not know if the Song is beautiful. I know that every person who has held it uses that word, and that none of them can explain what they mean by it, and that when they say it their hands shake.
The archive is quiet tonight. I am glad."