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
soldier
archer
I am an archer. My weapon of choice is a bow and arrow. I'm very skillful and shooting a bow and arrow.
Arg, I see that, lad. What's your name? I am Philip. I am work for His Majesty's Army.