In this episode:
I collect the last few Obelisk messages and find the corresponding treasure.
I also assist Twillen by placing the last statues in order for him to be young again. Furthermore; I release Archibald from his stony prison and receive the scroll of Arcane Magic.
NOTE: Releasing Archibald drops your reputation DRAMATICALLY. Don't do this if you still want to become a Light Master (even though if you would've wanted to, you should've done so a long time ago).
Just for good measure, the complete Obelisk Message:
"In the land of the dragon to north by far northeast, lies the cache of the captain 'neath the weight of the least. Hid for the Ship of the Sun before her functions ceased, lift the stone and you have won; this riddle's puzzle pieced."