Most of the prisoners found throughout Morrowind's many forts have fairly uninteresting dialogue if you try to talk to them. However, a Khajiit bard named Joshur imprisoned in Hawkmoth Fort in Ebonheart actually has a story to tell you. He claims "Joshur wrote a stupid poem and now Joshur is in bad trouble." If you have the Hawkmoth Prison Cell Key, you can offer to free him, but he will only tell you "No, Joshur is Khajiit. Joshur just get caught again."