Chapter 13: The Thought-Watcher Transcript, Entry 7741

The message came through a dead drop Elias had used twice before — the forty-third volume on the third shelf of the Natural Philosophy section, a thin book on surveying methodology that no student had requested in six years. He pulled it at eleven minutes past eight on a Tuesday morning, during the precise window when the second-floor reading room mirror was cycling through its relay. The strip of paper inside was Sera's handwriting, which meant she had not observed the protocol that said the drop was his to collect alone. He registered this without expression and read the four words.

Sub-basement. Tonight. All.

He returned the volume to its place and noted, on the way back to the Record Room, that the word all was the deviation. They had never yet used it. The rule had always been that full assembly was unnecessary for passing information and was therefore a risk that the information had to justify. He spent the morning processing legitimate reclassification filings — two of them, forwarded from the Ministry's provincial satellite office with Wicklow's stamp and a three-week lag — and he thought about the word all the way that he thought about any anomaly, which was to sit with it and not touch it until he understood its shape.