Ok so I'm in the basemant clearing out nightkin but where do I go now? Is there a passage in the prison or somewhere because I see the ottom section of the map can be filled in a little bit but I have no idea where I am going!

the basemant isn't very large, if you wander around for a good 5 min. just look around and try to keep taking the stairs that take you further down.. that way you'll find your way to the prison. also if you're asking about the prison i assume you ran into somebody in the basemant.. the prison is pretty much on the opposite side of the building from where you ran into that character (if you did in fact run into him already). there should only be 2 staircases taking you further down if i remember correctly, one takes you to the character and one takes you to the prison