Garden walls to S, W and N of Nantygarth

Walls of purple rubble stone with end-on coping stones, S wall runs W from driveway with pointed arched doorway in grey stone to left of driveway. At left end, SW corner tower of two walls with pointed opening to each outlined in squared grey stone and battlements. Wall then runs N with sequence from SW of corner tower, square pier, raised section of wall, square pier, another raised wall, pier and NW corner tower. The raised sections of wall have a pointed loop and 3 battlements alternately gabled and square, the piers are square with chamfered caps and small sandstone obelisk finials. The top corner tower is cruder than SW feature, with one blocked pointed opening. Plain garden wall runs back along N side to join garden wall of Machen House at another tower feature, this one with one E face into Machen House garden and one S into Nantygarth garden.