Returning to Samuel | Mission 6 - Return to the Tower Dishonored Guide
Last update: 11 May 2016
New Main Quest: Reach Samuel's boat and escape Dunwall Tower
You now need to return to your starting point, i.e. to [Dunwall Tower Waterlock]. If you are currently staying on one of the Tower's lower floors, it's best to return to the Tower's main entrance. If you've explored the Tower's roof, I recommend that you take a shortcut, i.e. jump off the roof into the moat around the Tower (the above screenshot). Note - There may be Piranhas in the water, so try and get back to the dry land as quickly as possible.
New Main Quest: Leave with Samuel
On your way back, you should pay attention to all the threats you had to deal with at the earlier stages of the mission's performance. Expecially, you should remember about tall boys, walls of light, and the watchtower. After you reach the location in which Samuel is staying, initiate a conversation with him and confirm that you want to finish this quest (the upper-right dialogue option).