He worked in the hours when the hospital exhaled and the bustle softened into an organized hush. First came the survey: a glance across the tiled floors for streaks, a fingertip lifted to test the veneer of dust on a windowsill, the practiced tilt of the head to listen for the small things — a hum in a fluorescent tube, the faint grating under a heavy cart wheel. Dr. Lomp moved through those rooms with the calm decisiveness of someone who knew the architecture of unseen needs.