You need to open the locked door of the building next to the bridge which holds the fire jars. This guide will show you how to open the locked door of the building.
Once you have opened the locked door, you need to grab a fire jar and place it at the stone wall under the bridge to reach the wealth of Old Gravesham Bridge.
There is actually two ways to open this door - You can watch this quick video of Old Gravesham Bridge AC Valhalla to show you one way to do it.
The gear / armor which is found at Old Gravesham Bridge wealth, is actually the Spartan Shield.
So in order to get the wealth of Old Gravesham Bridge in AC Valhalla, you need to find the house near Old Gravesham Bridge - which is shown in the video above. Then once you find it, you will notice that the door is locked.
There is two possible ways to get in here. You can light a fire with your torch, then throw it on the door to open it or you can go to the part of the building that you can walk through with a roof. There is a ledge that you can climb on the inside of the roof, then break your way in through the breakable wall.
Then once you are inside, dispose of the enemies and pick up a fire jar and head back to Old Gravesham Bridge where the stone wall is. Place the fire jar down and then shoot it with your arrow.
]]>Here is a quick, straight to the point video showing you how to get inside the red building in Mannskapsangrep which then allows you to get the two treasure loot chests that are inside.
After trying both doors and looking for no possible entrances on the bottom level, you will then need to head to the roof.
Once on the roof of the locked building during the Mannskapsangrep raid you need to hack and slash the top part until an opening breaks free.
Then just climb on through and enjoy opening both the treasure chests inside.
Then you can break the red glowing lock and exit through the door.
]]>