Finding your way out of the warehouse | Mission 7 - The Flooded District Dishonored Guide
Last update: 11 May 2016
New Main Quest: Escape from imprisonment
Before you start this mission, you will get to talk with the Outsider. The conversation isn't long and it doesn't involve taking any decisions. The actual gameplay begins when you are imprisoned inside a container in one of the [Flooded District's] warehouses. You can break free in two different ways. The first variant assumes that you pick up loose bricks and toss them against wooden boards.
Variant two assumes that you possess a rat. You could, afterwards, squeeze through the ventilation shaft.
New Main Quest: Find a way into Daud's territory
New Optional Quest: Return to the Greaves Refinery, where your gear was dropped
Regardless of how you freed yourself, you now are in a ruined warehouse. It is, of course, a good idea to explore it. Apart from the assassin's blade you can find here gold, food, a book, two Sokolov's health elixirs, Piero'a spiritual remedy and two notes (Corvo's Bounty Note), (Report to Daud).
The easiest way to leave the warehouse is to take the stairs to the lower levels. After you reach a water tank, you would have to jump into water and find an underwater tunnel.
Another way to leave is to take the stairs to the upper level. Unfortunately, the upper leavel is guarded by two assassins. It would be best, if you went around them, with the help of the power of Possession or by holding time. If you are going to eliminate them, wait for them to move away, and only then move into action. Around the place, there are gold, food and a note (The Brigmore Job). After you do everything there is to do, walk onto an external balcony and jump into water.