You confirmed it by checking.
The confirmation took twelve of the eighteen minutes.
The last six were waiting that came after confirmation — the still point between decision and action, when everything had been decided and nothing had been done yet and the world was briefly very clear.
Below him, the city conducted its evening business. The streets were amber-lit and busy. On the adjacent building, the foundation's security personnel moved through their rounds on a schedule Tav had observed and documented across three previous events. Three guards, two exterior, one lobby. The rotation created a blind spot on the north face that lasted exactly four minutes and thirty seconds every forty minutes.
He had eleven minutes until the next blind spot.
Through the scope: the gala's first floor, visible through the tall windows. Chandeliers and evening dress. The basic choreography of people performing their social importance for each other with great subtlety and considerable effort. The foundation's board members had the look of people who believed in what they were funding; the guests had the look of people who believed in being seen to fund it. Both of these things could coexist in the same room without distress.
Dean Voss moved through the center of the first floor with the unhurried ease of a man in his natural environment. Leather satchel absent tonight — appropriate evening carry. No security personnel in visible proximity. A man who had spent long enough operating with impunity that he'd stopped imagining its interruption. That alone was a data point. 9:17.
Tav checked the approach route in his mental map. The sight picture was clean. The wind from the river had settled to a negligible speed from the north-west. His position was confirmed by two separate pre-assessment surveys as unobservable from any approach angle that a response team would take. 9:19.
His phone vibrated. The private line. Ablation.
He checked it.
SUBJECT PROXIMITY INCREASING. CONFIRM EXTRACTION WINDOW.
He replied: CONFIRMED. WINDOW INTACT.
He put the phone away.
Then stopped.
Looked at the message again.
SUBJECT PROXIMITY INCREASING.
He had been reading those messages for months. He had read them as updates about Dean Voss — the dean's movements, his schedule changes, his proximity to whatever Ablation's actual interests were.
SUBJECT had always meant Voss.
But.
SUBJECT PROXIMITY INCREASING.
He turned the phrase over. Considered the language. SUBJECT PROXIMITY — not SUBJECT'S PROXIMITY. Not the proximity of the subject to a target or a location. The proximity itself as the variable. The subject being proximate to something. To whom.
He thought about the apartment. About the Pairing Protocol and the synchronization data and the language of attachment evaluation threshold.
SUBJECT PROXIMITY INCREASING.
Both subjects. Increasing proximity to each other.
He put the phone back in his coat. 9:22.
He returned the scope to the window.
And found Alistair Keaton in the service entrance to the right of the foundation building's south face, moving through the staff access with the way someone who knew exactly where they were going. Tav lowered the rifle.
He had known — had recorded the evidence, had followed the logic to its conclusion — that something was different about this assignment. He had known and he had not named it,because naming it required deciding what to do about it and deciding required certain information he hadn't yet confirmed.
In the service entrance of the building below him, Alistair slipped through a staff door that opened inward on a latch that had been left unlocked by someone with foreknowledge of its position.
Tav moved.
