I received Korgan quest sometime ago when i let him join in for that few seconds. But i ditch him immediately after i stripped him naked (like all other NPCs tat i meet but dont want). Now i am about to go to Chpt 4 but wanna finish this sidequest. Wat should i do and where to go? Do i need him to join in again to slove this quest? Tks

Bit hard to do his quest if he's not there. Go back and pick him up, then do some exploring of the southern part of the lower tombs.