The   irate   ortress
10,10 = Return to Main Isle
15, 3 = Northeast Gate to the Main Isle
15, 7 = East Gate to the Main Isle
15, 9 = Southeast Gate to the Main Isle
 0, 1 = Entry from Main Isle, 11,1
 6, 6 = Takes you to 15,11.
14, 5 = Trapdoor to 0,1.
 7,15 = Takes you to 4,15.

If anyone finds a mistake on this map,
please let me know :)