Harkyn's Castle  
 
Spoilers, Level 1

If the Bard sits on Harkyn's Throne, the magic door at 14n/9e will open. 
Get the Crystal Sword, you are going to need it.  
 
T Harkyn's Throne 
G Captain of the Guard 
J Jabberwock 
C Crystal Sword 
1 Three marble steps lead to the Baron's Throne. 
2 You are in the Royal Bedroom 
3 A sign says, "NO Trespassing." 
