George Thomas Clark, Mediæval Military Architecture in England…
“ Of Bristol there remains only a portion of a crypt. Gloucester, Hanley, and Worcester are gone. Of Bridgenorth a part of the keep is all that is seen; and of Shrewsbury a fragment of a Norman gatehouse, the much-altered walls of the hall, and, older than all, the mound that gave character to the whole. Berkeley, on the other hand, has been inhabited from its foundation to the present day. With one temporary alienation to the Crown, it has always been in one family, and it is as little altered as is consistent with modern usages and modes of life. ”
