Map given to the RATS by Mersoolian Threce.
A reference to this map was found under Nal Kashel inscribed on a set of Gugg-hide armor.
The location appears to be designed to trap a dragon that tries to get to it’s center. Probably the “cradle of the Song of the Dawning Star” referenced in the note from Abdul Alhazred.
Possibly of Azlanti origin.
Images
From Mersoolian Threce:
From Gugg armor: