Trade Secrets is a Quest in Pillars of Eternity 2: Deadfire.
- Locate Delver's Row.
- Reach the Undercroft.
- Report to Prince Aruihi.
- Travel to the Gullet.
- Investigate Delver's Row.
- Visit Delver's Row and Undercroft. To find Delver's Row you need to interact with The Narrow at The Gullet. Turn right first, then go forward until you see a merchant stall, the entrance is behind a curtain.
- To reach Undercroft, you can use the lift in Delver's Row (if you already met Dereo.) Or use the lift in The Gullet, go through Old City Overlook, Old City Ruins to get there.
- Report to Prince Aruihi, you could suggest him to leave Delver's Row open.