You're no prisoner here, Daud. You just haven't the strength to leave yet.

[And Corvo is sure Daud will be stubborn as hell until the moment he does leave the Tower.]

Your work will probably kill you. I have a feeling that's what you want. Better to go out fighting, hm?

[Corvo can understand that feeling. He doesn't like the idea of wasting away as an old man, but that may be his fate due to the luxury he lives in.]