George Thomas Clark, Mediæval Military Architecture in England…
“ The buildings outside of, and built against, the west curtain projected boldly into the moat. They are in great decay. Here was the fireplace, the flue from which, wrought out in the substance of the curtain, rises above it as an elegant octagonal chimney shaft, the summit of which is crowned by the elegant lanthorn or spiracle which has so often been drawn and is so well known. ”
