A grey, stone section of the tower.  There's a small rectangular cut out in the wall to allow archers to shoot through the hole at invaders.  It's a generally hot and stifling place.
Murder hole, Inside Tower
enemy
peasant
I am poor and dirty. I hate that I am starving to death. I am a hard worker.
Please m'lords, does anyone have something I might eat? Perhaps, perhaps. Can you tell me where you last saw the King? The Lord has all the answers you'd seek, for he is the true King! Yes yes... well, then I seek the false King. I want to overthrow this kingdom. If you help me, I could make sure that you are well cared for. Hnngg, it's so warm in here. Do you have food you could offer me sir? This will warm you. Do you know how to get from the murder hole to the King's chambers? Well... ummm... I think when you go down the stairs you take a left... but I am having trouble remembering where to from there... I'm just so hungry! I have no food with me to give you, but I can give you all the food and gold you want... just get me into his chambers. Down the stairs, take a left, and then what? Well... why do you need to see the King? Your King has destroyed my village. I'm here for retribution! Help me get him and I'll give you food and riches! I suppose I could assist... ughhh my stomach.... I think I'll need this for what you're planning. I'm glad you are on my side. Now where do we turn next?