CITY ELF FINALE
Vaughan will be hiding in the last room (City Elf Origin M3, 8) and there are two ways to resolve the situation involving him and kidnapped women. If you agree to his proposal you'll receive a lot of coins and you'll return with Soris to the alienage (don't forget to revisit the hiding spot the next chance you get). Otherwise you would have to defeat Vaughan and two lords. I would recommend dealing with the lords before attacking Vaughan. Talk to Shianni once the arl has been killed. Sooner or later you'll return to Denerim’s Elven alienage (City Elf Origin M1, 13) where you'll have a chance to talk to Valendrian and Duncan. If you decided to take the gold you'll have to come up with some kind of a lie. Otherwise you'll tell them the truth. It won't take long before guards show up and they'll be looking for someone to blame for the break in (and ransom) or for arl's death.
The best way to end this quest is to blame everything on yourself, because Duncan will recruit you to join the Grey Wardens before you'll be thrown in jail. If you do something differently Soris will be apprehended. This will also occur if you decide to keep quiet, because Elva would interfere and point the blame on you and Soris. Say goodbye to all the elves and talk to Duncan when you're ready to start your journey.