In chapter 7 go to the castle as Cecile and search for the shining spot on the left side of the castle, activate it and there will be a scene where Cecile prepares food for Carla, then go visit Ehrke. Then change to Tina and go visit Ehrke, finally go talk with the guard at the entrance of South Durham as Tina, you should now be able to enter South Durham as Cecile.Nope, I cannot get into South Durham with Cecile. She talks to the guard, he offers to let her past for a service, but then Cecile thinks (Tina is investigation this place, blah blah, blah) and I can;t get past the guard.