Gately's dream-M.D. temptation (p. 890)
The ceiling throbbed a little but did not breathe. The one visitor-chair was back over by the wall. He looked down. Either the stenographer’s notebook and pen had got knocked off his bed or the dream had made up that part, too. […] But the railing Joelle van D. had folded down to sit on the bunk in the fucking Erdedy kid’s sweats was still folded down, and the other railing was still up. So there was some like evidence of the one part, that she’d been really there, showing him the pictures.
Context
The waking reveal, run as a forensic sweep for evidence of visitation: chair back at the wall, notebook maybe never delivered, ceiling throbbing but not breathing. After the wraith, Gately's default assumption about any visitor is spectral-until-proven-otherwise — and the only certification the real world can offer is a folded-down bed-railing.