For forty years, the sound of footsteps on the crypt stairs came at the same hour. Lately it comes a half hour late. I've decided not to ask why. If I ask, that half hour will disappear.

• ViolenHalf an hour. Your master knows better than anyone what wears thin first, when you put off the dawn.
  OsmonIf we're counting what wears thin first, that would be me, great-aunt.
• GrahamSo, old man, you're telling me you sit up listening for that sound clear until dawn.
  OsmonIt's the job.