He told me never to touch the empty frame at the end of the gallery. And yet these days, that's the one spot with no dust at all.

• GrahamI saw it on a house call. He stands there every night.
  OsmonEven if you saw it, you saw nothing, doctor.
• PaulineThat's the one hallway I always run through.
  OsmonDon't run. The floor is older than I am.