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392 pages, Paperback
First published January 1, 2009




What was Hadrian’s Wall for? This is a harder question to answer than one might think. Little is known for sure about the population of northern Britannia (Scotland), but it is hard to believe that it posed much of a military threat. It is not obvious that building and managing a defended frontier along a fixed line was cheaper in manpower and treasure than annexing and governing the Scottish Lowlands, [which] could have been defended by a loose arrangement of forts that would cost no more, and maybe less, than manning a great wall from the Solway coast to the North Sea.
. . . . . .
One can only conclude that the emperor was restating his commitment to imperial containment. As with his building program in Rome, he used the visual language of architecture and engineering to make a political point. The white ribbon thrown across an empty landscape and the monumental vallum were politics as spectacular art. (244-45)
Before I built a wall I'd ask to know
What I was walling in or walling out,
And to whom I was like to give offence.