thanks for the help, it's just access to the battlements I am unsure of I know the stair would run up one or more corners and usually corner turrets rising above the battlements cover these. I don't want turrets just a square topped keep and don't know what covered the stairs on this type of keep, trapdoor or some other structure. It will be a display piece so the insides don't really matter, based around the time of The Anarchy so quite early for a stone keep