After you enter the crypt nearCamp Overlook.
Inside, smash the crumbling wall and you find the mural behind it.
Right after you climb the stairs into the building, past the small yard on the first floor.
In the crypt, after you descend to the very bottom.
After you enter the cave to theAncient Cisterntomb.
To reveal the passage, you oughta throw down the log attached to the nearby crane.
This smashes the planks and reveals the cave entrance.
On the wooden wall of theSupplies store, close to the campfire in theCommunications Towercamp.
On the wall of the destroyed building, right before the cart.
A bit past the campfire inCopper Mill Yard Camp, to the left of the gate.
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