Mackenzie, Sir J. D. The Castles of England, their Story and Structure. 2 vols. London, 1897.
Neilson, George. The motes in Norman Scotland (Scottish Review xiv. 209-38).
Oman, Prof. C. W. C., F.S.A. A History of the Art of War in the Middle Ages. London, 1898.
Orpen, G. H. Motes and Norman castles in Ireland (Proc. Royal Soc. Antiq. Ireland, xxxvii. 123-52).
Parker, J. H., and Turner, T. Hudson. Some account of domestic architecture in England. 3 vols, in 4. Oxford, 1851-9.
Round, J. Horace, LL.D. The Castles of the Conquest. (Archaeologia, lviii. 313-40).
—— Feudal England, Historical Studies on the XIth and XIIth Centuries (new edition). London, 1909.
Saint-Paul, Anthyme. Histoire Monumentale de la France, 6th edition. Paris, 1903.
Turner, T. Hudson; see [Parker], J. H.
Van Millingen, A. Byzantine Constantinople. London, 1899.