Over the
entrance to the west ten ramparts overlap and double so that attackers
were in a perfect maze of walls and enfiladed so effectually that it
is difficult to imagine any storming party being successful. On the
east the opening, without being quite so elaborate owing to the
steepness of the hill, is equally well defended. The steep walls on
the north are no less than sixty feet deep and to storm them would be
a sheer impossibility. What makes this splendid monument so
interesting is the assertion made by nearly all authorities on the
subject that these enormous works must have been excavated without
spade or tool other than the puny implement called a "celt." Probably
wall and ditch were elaborated and improved by the Romans, and while
in their occupation the name of the hill became Dunium. Blocks of
stone from Purbeck, used at certain points of the defence, were no
doubt additions during this period.
A pleasant journey may be taken through the Winterbourne villages that
are strung along the line of that rivulet, which, as its name
proclaims, flows only in the winter months.
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