Cipher on a String

Exploration Stage: Observatory
From: Huntress
Description: I noticed several Aeneas’s Disks in the Observatory. Aeneas invented a coding device that uses a plate with holes, which a rope is pulled through. Bring me all the disks you can find. I will help you find out why the Astronomer didn’t ask for help.
Completed: On Aeneas’s Disk you found, each hole corresponds to a letter. If I untangle the thread, I’ll be able to read the Astronomer’s encrypted message.