Reaching Daud's chamber | Mission 7 - The Flooded District Dishonored Guide
Last update: 11 May 2016
Take your time now, because the first assassin is standing to the left of the entrance, and he should be facing you. The best way to go around him is by teleporting, holding time, or using the power of possession (the nearby rats or the assassin himself). Take the opportunity and search around the first location in the headquarters to find gold, two notes (Notice from Daud) (Instructions from Daud) and sleeping bolts. For the time being, ignore the cabinets that are now locked. You will be back here when you obtain the right key.
Go left now, and watch out for one more enemy. After you reach a larger room, you will encounter two additional assassins. If you are going to eliminate them, you'd better act quickly, and take out the student first, and then the teacher, who is turned away from you. Otherwise, try and walk past them and remain in shadows to the extent to which it is possible. As far as the room is concerned, you can find here gold, Sokolov's health elixir and a Piero's spiritual remedy.
Regardless of whether you have dealt with the abovementioned assassins or not, you now need to reach the passage shown in the above screenshot. After you get to the lower-located roof fragment, use teleportation to reach either of the windows above. Personally I recommend the window to the right, which will make you get closer to Daud's chamber. Thanks to this, you will be able to eavesdrop on the conversation he is having with one of his subordinates. If you chose the other window, It may be necessary to eliminate, or avoid a single assassin.