What the title says. This is more of a PSA and/or feedback about this treasure.
Long story short: Give a specific item to this npc, he rewards with a lootable object for treasure achievment. I handed the item in, another player immediately took the treasure and it despawned, leaving me with nothing and in the long run, an incomplete achievment for treasures of Isle of Dorn that I cant complete, since the I cant spawn the treasure again other than stealing from another player.