The Cask of Amontillado
How we cite our quotes:
For the half of a century no mortal has disturbed them. (91)
The big reveal at the end: Montresor’s revenge was successful, and he’s gone undiscovered for fifty years. Also note that it doesn’t say the bones outside of Fortunato’s crypt haven’t been disturbed at all, just that they haven’t been disturbed by ‘mortal[s]” − surely ghosts and ghouls aren’t out of the question.