Where is Golthag?

During the main quest of Arena, when asking for location of Fang Lair, the queen of Rihad in Hammerfell tells you:

Welcome to Rihad, (players name). I am Queen Blubamka, and I agree to tell you about Fang Lair, for a favor. You see, not too long ago a band of goblins, led by Golthog the Dark attacked this stronghold. They carried away with them much treasure, including a parchment which held within its writings clues to decipher the part of the Elder Scrolls which spoke of the location of the legendary Fang Lair. Golthog and his goblins fled to an ancient and ruined fortress called Stonekeep, outside the city...

Then, after you return the parchment to her from Stonekeep, she gives her thanks and mentions that she "hope[s] you put Golthog into an early grave as well."

I cleared out nearly all of Stonekeep and didn't see any sort of Goblin Chieftain or boss type creature? Did I miss him or did the developers just forget to put him in the game or something? Where is he?

I couldn't find anything about it on the wiki.

Thanks!