The wizard tapped the steam-pipe with a small crystal hammer, listened intently and then shuffled along, tapping again.
"Are we haunted or not?" asked the impatient captain.
"Shhh," the wizard hissed.
"We can't be having things move about on their own or messing with navigation."
"Shhh," repeated the wizard, tapping another section.
The pipe howled, rattling the whole vessel.
The wizard blanched, "We're going to need a bigger crystal."