Wall, (sometimes called a dyke, fr. mur): this is generally found named in connection with castles or towns which are walled(muraillé). A wall of this kind should be masoned(fr. maçonné) and embattled(fr. crenellé), even though this be not specified.
Argent, a tower flanked by a wall and two turrets gules--DAMAN.
Gules, a tower embattled with a round roof between two other turrets standing on a wall extended in fesse, arched inarched ... --BRIDGMORE.
.... On a mount rising out of water a castle with three towers embattled and domed and joined to each other by a circular wall ... --Seal of the town of BOSNEY, Cornwall.
Or, a dyke[or wall] fesswise[masoned proper] broken down in some places gules; on a chief sable three escallops of the first; in base a rose as the second--GRAHAM, Inchbrakie, Scotland[similar arms borne by GRÃME of Stapleton].