A Description and History of Caerphilly Castle: Also, a Description of Castell Coch. E-book. Formato PDF George T. Clark   -  Forgotten Books, 2017  - 

The castle is in plan nearly a semicircle, the main ditch forming the curve, and the cliff and river the chord. The long axis lies north and south, and the gateways are at opposite ends. The whole work measures 440 yards, by from ninety to 130, and covers about three acres. The inner ward contains the drum towers, the cur tains, the chapel tower, the ball, and the kitchen.