11. The south wing wall is 324 feet long and the north wing 405 feet. 12. Soon after, money ran out and only the west wing wall was actually built. 13. The culvert is arched with picked stone wing walls and stone deck and abutments. 14. The bridge uses dressed-stone for the arch rings, and has coursed-rubble spandrels and wing walls . 15. The western portal is built from stone with buttresses and wing walls to each side. 16. Once the stone arch was built, the spandrel walls and wing walls could be added. 17. The galleries were built on three levels and spread on wing walls of the castle. 18. South wing walls are clad in buff-colored brick. 19. The spandrel and wing walls are built in alternate courses of ashlar masonry and rock-faced blocks. 20. The spandrel and wing walls are built in alternate courses of ashlar masonry, and rock-faced blocks.
