Gear: Durendal (Short Sword)
Aquila is south of Evreux.
The chest is inside a well in the northern part of Aquila.
Destroy the top and climb down.
Charles's Forward Camp
The camp is in the northern part of the Evresin map.
The chest is inside the big tent at the top.
Tungsten Ingot and Book of Knowledge: Plague of Rats
The Gisacum Ruins are north of Evreux.
Go down into the ruined building.
There is a wooden floor you can destroy and go down further.
Down there, you can open the Hidden Ones door and get inside.
Avoid the rats by climbing on the furniture and stay on higher ground.
The chest with the Tungsten Ingot is here in the corridor.
In the center of the rat infested basement you'll see a ramp that leads up to a destructable wall.
There were plenty of Oil Jars on the way in.
Get one while avoiding the rats to destroy the wall.
Go through the now open passage, just to see another wall that needs to be destroyed with a jar.
Behind it is the Book of Knowledge.
Gear: Paladin Hood
Lisieux is west in the Evresin Region.
The chest is in the crypt. It's the small building next to the church.
There are two keys you'll need. One to open the crypt and one to open a door inside the crypt.
The key for inside the crypt is inside the church's tower.
Climb up the ladder, shoot down the other ladder and move the shelf so you can reach.
The key is on the desk.
The key for the crypt is carried by a monk in the southern part of the town.
See the second pair of screenshots for the location.
Sneak to him and steal it.
Open the crypt and go down.
In the room with the flag: The locked door with the chest is behind the flag.
The camp is between Lisieux and Evreux.
The chest is inside the building at the top floor and requires a key.
The key is carried by one of the soldiers.
Pont-de-l'Arche - 1
Pont-de-l'Arche is in the northeast of Evresin.
The chest is north of the river under a red tarp.
Pont-de-l'Arche - 2
Book of Knowledge: Goule Breath
The Book of Knowledge is in the church.
The entrance door needs to be forced open.
Pont-de-l'Arche - 3
The chest is in the chapel below the church.
Door needs to be forched open.
Pont-de-l'Arche - 4
The chest is in a storage building in the south.
The camp is in the very south of Evresin.
The chest with the Ingot is inside the big red tent.