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5. William Roy: still an enigmatic figure in Scots cartography
General William Roy 1726–1790: father of the Ordnance Survey
, by Humphrey Welfare, Edinburgh, Edinburgh Press, 2022, 303 pp. + xiv, £90.00, ISBN 978-1-3995-0578-9 (hardback), 978-1-3995-0581-9 (epub)