The Carousel

How do I begin investigating the carousel?
Why won't my access card open the carousel gear room and band organ?
Should I call this Tink person?
How do I locate the "third roll" (whatever that means)?
How do I open the cabinet in the gear room and find the third roll?
How do I load roll three into the band organ and then play it?
How do I know which notes are being played during the band organ tune?
Should I ask around about the device I found under the carousel?
How do I get that letter down from the ledge in the gear room?
What do I learn from the letter?

Up One Level