The key is within our grasp, but getting ahold of it is another story.
This is a plan in phases - phase one is creating a fake replacement key.
Lucky for us, the key to the chest bears a striking resemblance to a fish skeleton - we just need a fish skeleton and something to hang it from.
You're unlikely to find one laying around, so the next best option is to find a fish.
Where there's fishermen, there's fish. Try the docks.
Yes, Geron doesn't seem to get much love no matter where he goes.
Get Nuri to speak to the ferryman, then meet up with her on the docks and see how she did.
This is a full fish, though - we only need its skeleton.
We do still have a sharp object that could be useful here.
Use your knife on the herring to separate it from its skeleton.
All that's left now is to hang it from something.
Remember, Harm could wear his key around his neck.
We'll need a similar attachment on our fake key to avoid suspicion when they're swapped.
Harm actually gave us something that could prove useful hear - a necklace that all messengers are supposed to wear.
Use the anchor necklace on the skeleton to make it into a beautiful necklace. Nice!
That's phase one of the plan complete - phase two, swapping the keys.