Proof of the former king's rule

This quest is difficult to do as the 4th person you speak to (in Tumbes) doesn't give you much info to go on. I found an entry in the olous forums about it, if the info there is correct you need to defeat an NPC to finish it off. So I abandoned it after learning this and cannot confirm the last steps.

1. Get quest from adventure mediator in Lima.

2. Talk to Market Keeper

3. I forget this part, but you speak with 2 more people in Lima (or one person twice etc / City Official?) They tell you to go to Tumbes.

4. Sail to Tumbes

5. Speak with City Official

Now this part I haven't confirmed..

6. Sail to Northwest South America landing point

7. Defeat lvl 40 NPC by large rock

8. Search around there, win prize, go home a hero?

source: http://unchartedwaters.olous.com/ask-the-experts/4124