Journey

I played as the Barbarian. Great map! Thanks to the creator!

I have a couple of questions, maybe someone can answer...

I still haven't received the quests for:
1) The Dwarven artifact set
2) The Sextant of the Sea Elves
3) Ashi's Tear
4) The Sword of Cold
And yet, I found all of these. But I don't understand where to turn them in.

Thanks in advance for the answer.