An archaeological appraisal." Archaeologia Cambrensis 132 (1984 for 1983). pp. 1–18. Cessford, Craig. "Northern England and the Gododdin poem." Northern History 33 (1997). pp. 218–22. Clarkson, Tim. The Men of the North: the Britons of Southern Scotland. Edinburgh: John Donald, Birlinn Ltd, 2010. Clarkson, Tim. Strathclyde and the Anglo-Saxons in the Viking Age. Edinburgh: John Donald, Birlinn Ltd, 2014. Dark, Kenneth R. Civitas to Kingdom. British political continuity, 300–800. London: Leicester UP, 1994. Dumville, David N. "Early Welsh Poetry: Problems of Historicity." In Early Welsh Poetry: Studies in the Book of Aneirin, ed. Brynley F. Roberts. Aberystwyth, 1988. 1–16. Dumville, David N. "The origins of Northumbria: Some aspects of the British background." In The Origins of Anglo-Saxon Kingdoms, ed. S. Bassett. Leicester: Leicester University Press, 1989. pp. 213–22. Higham, N.J. "Britons in Northern England: Through a Thick Glass Darkly." Northern History 38 (2001). pp. 5–25. Macquarrie, A. "The Kings of Strathclyde, c.400–1018." In Medieval Scotland: Government, Lordship and Community, ed. A. Grant and K.J. Stringer. Edinburgh: Edinburgh UP, 1993. pp. 1–19. Miller, Molly. "Historicity and the pedigrees of north countrymen." Bulletin of the Board of Celtic Studies 26 (1975). pp. 255–80. Woolf, Alex. "Cædualla Rex Brettonum and the Passing of the Old North." Northern History 41.1 (2004): 1–20. External links Matthews, Keith J. "What's in a name? Britons, Angles, ethnicity and material culture from the fourth to seventh centuries." Heroic Age 4 (Winter 2001). Celtic Britons Medieval England 1st millennium in Scotland Sub-Roman Britain Anglo-Saxon England Medieval Wales Northern England History of Cumbria History of Dumfries and Galloway History of Northumberland History of the Scottish Borders History of Yorkshire Barbarian kingdoms Regions of England Regions of Scotland Historical regions in the United Kingdom Scottish Lowlands