Eivor came across a group of villagers at Lunden docks.
Dialogue
Eivor came upon a conversation on the docks.
Norse Woman:I heard the Gyldan Sparrow was carrying more 'n candies and spice from Aksum. He had a hefty necklace in there too.
Anglo-Saxon Man:Makes sense as to why The Compass would send the whole boat into the drink then. Bloody shame. Worth a pretty penny.
She found a note left on a nearby crate.
Note My boat, and all its priceless cargo, has met its end at the bottom of the river. If you recover any please contact--
She approached the group.
Eivor:This harbor houses sunken treasure?
Norse Woman:Ja, the current's too strong to pull the wreck out, so we're left to lament the loss. You interested?
Eivor:I am a strong swimmer. I fear no cold, current, or drengr of the deep.
Norse Woman:Then by all means, we can scrape together a reward fit for the cargo's rescue.
Eivor discovering the shipwreck
Eivor swam towards the wreck.
Eivor:That must be the corpse of the Gyldan Sparrow that merchant mentioned.
She looted two chests from it and returned to the surface.
Eivor:One chest with treasure, another with this bottled message. I wonder if it has preserved its message.
Eivor read the message.
Waterlogged Note Compass keeps taking too healthy a share of my wares. Watch the bastard try to take my coin when they're stuffed inside a cow's stomach.
She approached the group again.
Norse Woman:A message in a bottle? Ah, wise. Hid a necklace in a cow's stomach. Guess you'll have to go fishing for the rest of the treasure.
Eivor returned to the water's edge and started fishing. She hooked a fish.
Eivor:Come now, you little scaled cowards. Pull on my line.
Eivor pulled in a large pollock and retrieved the treasure from it.
Eivor:Slippery bastards. Must be the necklace. That is a lot of silver. Why shouldn't I keep it?
Eivor approached the group again.
Eivor:I have the treasure you seek.
Norse Woman:Do you? Please, give it here, then.
Eivor handing the necklace to the woman
Eivor:Found this necklace in the guts of a fish. I could not get rid of the smell.
Norse Woman:Even reeking of fish, this is priceless. Many thanks!
Eivor:I risked my neck swimming into the drink, so the spoils are mine.
Outcome
Eivor recovered the treasure from the shipwreck, caught a pollock and either gave the woman her necklace or kept it for herself.
Behind the Scenes
If Eivor kept the necklace, it goes from a quest item to a trinket and can be sold for 62 silver. Despite the woman's claims of a reward if it's "returned", there doesn't seem to be one.