Note 107 — III Anglo-Norman Warfare
Reading edition
“Lincoln Castle, as regards its earthworks, belongs to that type of English fortress in which the mound has its proper ditch, and is placed on one side of an appended area, also with its bank and ditch.... In general, these fortresses are much alike, and all belong to that class of burhs known to have been thrown up by the English in the ninth and tenth centuries” (Clark’s ‘Mediæval Military Architecture,’ ii. 192).