the collapsing political fortune of Stephen in the north of England, and was deposed by the pope. David used his Cistercian connections to build a bond with Henry Murdac, the new archbishop. Despite the support of Pope Eugenius III, supporters of King Stephen and William FitzHerbert managed to prevent Henry taking up his post at York. By 1149, Henry had sought the support of David. David seized on the opportunity to bring the archdiocese under Scottish control, and marched on the city. However, Stephen's supporters had gotten wind of the plan, and informed King Stephen. Stephen therefore marched to the city and installed a new garrison. David decided not to risk such an engagement and withdrew. Richard Oram has conjectured that David's ultimate aim was to bring the whole of the ancient kingdom of Northumbria into his dominion. For Oram, this event was the turning point, "the chance to radically redraw the political map of the British Isles lost forever". Notes References Primary sources Anderson, Alan Orr (ed.), Early Sources of Scottish History: AD 500-1286, 2 Vols, (Edinburgh, 1922) Anderson, Alan Orr (ed.), Scottish Annals from English Chroniclers: AD 500-1286, (London, 1908), republished, Marjorie Anderson (ed.) (Stamford, 1991) Barrow, G. W. S. (ed.), The Charters of King David I: The Written acts of David I King of Scots, 1124-1153 and of His Son Henry Earl of Northumberland, 1139-1152, (Woodbridge, 1999) Lawrie, Sir Archibald (ed.), Early Scottish Charters Prior to A.D. 1153, (Glasgow, 1905) Forbes-Leith, William (ed.), Turgot, Life of St Margaret, Queen of Scotland, (Edinburgh, 1884) MacQueen, John, MacQueen, Winifred and Watt, D. E. R., (eds.), Scotichronicon by Walter Bower, vol. 3, (Aberdeen, 1995) Skene, Felix J. H. (tr.) & Skene, William F. (ed.), John of Fordun's Chronicle of the Scottish Nation, (Edinburgh, 1872) Secondary sources Bannerman, John, "The Kings Poet", in the Scottish Historical Review, vol. 68 (1989), pp. 120–49 Barrow, G. W. S., The Anglo-Norman Era in Scottish History, (Oxford, 1980) Barrow, G. W. S., "King David I and Glasgow" in G.W.S. Barrow (ed.), The Kingdom of the Scots, (Edinburgh, 2003), pp. 203–13 Barrow, G. W. S., "David I (c.1085–1153)", in the Oxford Dictionary of National Biography, Oxford University Press, September 2004; online edn, January 2006 , accessed 11 February 2007 Barrow, G. W. S., "David I of Scotland: The Balance of New and Old", in G. W. S. Barrow (ed.), Scotland and Its Neighbours in the Middle