Embrasure Splayed opening in a wall for a window Also the low segment of the alternate high and low segments of a Battlement Provided protection to people within the wall
An opening in the parapet (fort wall) through which a gun is fired Although it weakens the parapet to assault, the embrasure provides protection for the gun crew
A u-shaped indentation into a stone row These may well be a variation on the Prayer Seat, or possibly used as hunting blinds (see Prayer Seat for details)