Rune wants to find out about his origins, and why he was on that ship. All that was found with him was a small stone with strange symbols carved into it.
When you speak to Rune, there is no new quest generated. Your character simply says he/she will "keep a lookout".
I really want to find the quest associated with this, so I pickpocketed Rune to see if I could take a look at the small stone. He does not have it with him.
I then searched for the shipwreck. It is supposedly off the coast near Solitude. I travelled around and eventually found "Orphan's Tear". It is on the north shore to the West of Solitude. This may be the shipwreck. I searched it from top to bottom, found a little treasure but nothing significant.
No new quest was started.
This is only intensifying my curiosity, I really hope there is a quest associated with this.
Does anyone else know any more about this?