Exploring the area around the quarantine wall | Mission 7 - The Flooded District Dishonored Guide
Last update: 11 May 2016
New Main Quest: Get through the quarantine wall and out of the Flooded District
Right after you emerge from the tunnel, start exploring the area by going to the right. Watch out for a group of rats, that may attack you out of a sudden. They can be disposed of with your pistol or with grenades, but you can also avoid them by jumping onto one of the boulders and killing them off with your blade. After you dispose of the rats, explore the area in search of a bone charm.
Backtrack to your starting point and, for a change, go left now. After you reach the place, where bodies are tossed out from railway cars, turn left. On your way, you should pass two civilians, but you do not need to help them, nor fear any negative reaction on their part. Go towards the warehouse shown in the above screenshot.
In the area, there are two bandits, who are neutral towards you, and it's worthwhile to listen to their conversation. This way, you will learn about one of the possible routes past the quarantine wall. After they are done talking, it is a good idea to rob one of them to obtain the Mosley's warehouse key.
It's best to use the key right away to open access to the room located on this floor of the warehouse (the above screenshot). In here, you can find gold, ammo, a Letter to Ferg, a rewire tool and a Sokolov's health elixir.
Return now to where you earlier met the two civilians. I recommend that you devote a few moments to exploring the buildings located on the left (the above screenshot). You can reach the higher levels of the building by using teleportation. On your way up, you will be finding gold, food and Piero's spiritual remedy. In one of the chambers, you will meet an infected woman, and from her, you can also learn how to get past the quarantine wall.
After you are done talking to the woman, collect gold, food, bolts, book and a Letter to Alfa. Continue towards the top floors . Your current destination is the roof shown in the above screenshot, where there is a rune. It is worth remembering this place, because you may be back here sometime in the future.
Another step to take is coming near the main square in this area, i.e. the [Rudshore Gate]. This can be done in two ways. The first one is to near the square from the side of the warehouse with the two, previously met criminals. You need to watch out, however, because there are a few guards around.
Variant two consists in taking the roads behind the railway track, that the train stops on to unload the bodies. The good thing about the path is that it isn't watched by anybody.
The most serious threat on the square neighboring with the quarantine wall, are tall boys. Remember that their range of vision is wider than that of regular enemies so, you need to be even more careful if you don't want to be spotted.
An interesting point here to mention is that the game allows you to distract tall boys. In order to do that, you would have to supply a whale oil tank (it's in the warehouse that you earlier opened with the key), to the slot shown in the above screenshot. I strongly recommend against doing this, however because, after spotlights turn on, tall boys focus on the civilians inside the nearby buildings and start eliminating them. It is, yet, a good idea to explore the area around the slot to find gold, food, ammo, Sokolov's health elixir, Piero's spiritual remedy, a book and two notes (Contractor's note) (Tallboy Orders).
To wind up with, I recommend that you explore the buildings to the left of the railway track and the quarantine wall (the above screenshot). The buildings are best reached from the side of the abovementioned side alleys. You can find here gold, food and ammo. It is worth adding that a small room of one of the buildings is locked, but you can access it through the window.