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Map of the Roman Wall, in Cumberland and Northumberland,
scale about 2 miles to 1 inch, derived from a survey for the
Duke of Northumberland, 1853, by Robert Blair, 1909?
Included in the Handbook to the Roman Wall, by J Collingwood
Bruce, 1863, 6th edn edited by Robert Blair, published by
Andrew Reid and Co, Newcastle-upon-Tyne, Northumberland,
1909.
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