The Roman Barrier of the
Lower Isthmus.
PART II.
A GENERAL DESCRIPTION OF THE LINE OF THE WALL.
Numerous are the appellations which the Great Barrier of the Lower Isthmus has obtained. 'It was called by ancient writers vallum barbaricum, prætentura and clusura; by Dion διατειχισμα; by Herodian χωμα; by Antoninus and others vallum; by some of the Latin historians murus; by the English the Picts’-wall, or the WALL; and by the Britons gual Sever, gal Sever, and mur Sever. The names prætentura and clusura are given to it upon account of its being stretched out against, and excluding the enemy.' To the names thus enumerated by Camden, must be added, the Thirl Wall, the Kepe Wall, and that by which it is best known at present, the Roman Wall.
GENERAL VIEW OF THE WORKS.
This great fortification consists of three parts.
I. A Stone Wall, strengthened by a ditch on its northern side.
II. A Turf Wall or Vallum, to the south of the stone wall.