While Ravos Sorvalith is mentioned in the initial rumor, he will refuse to provide any help even at maximum disposition, preferring to keep Gorne's problems among Gorne's people.
Other villagers (the bartender and shopkeeper) will have additional things to say at high disposition, but it is not necessary to talk to them.
The following Journal ID and Index codes can be used with the Journalconsole command to manually update the quest to a certain point.
The Gorne Guard's Getaway (TR_m3_Go_Guard1)
Index
Finishes Quest
Journal Entry
10
The people of Gorne are concerned that the island lookout is missing. Ravos Sorvalith and the guard have searched the island thoroughly to no avail.
30
The island lookout was last seen on a hill north of town, just before the second bridge.
45
Methalas Eves says that the island lookout has been visiting her to offload pearls. She thinks he has been pearl diving.
50
Rellus Delano, captain of the Ghostly Lady, told me that prospective pearl divers will find Gorne's waters rich with opportunity.
60
I found the island lookout's corpse in an alcove under the sea west of Gorne.
65
Finishes quest
Under the sea west of Gorne, I found a Dunmer's corpse in an alcove. On him was an amulet bearing the mark of House Indoril. This may be of interest to somebody.
70
Finishes quest
I told Ravos that the island lookout drowned. He will share the bad news with the townspeople.
80
Finishes quest
It appears that the corpse I found underwater was that of a guard that had gone missing, Gorne's island lookout. I shared news of his death with Ravos Sorvalith.