First inroads of the Northmen 17 Turgesius 17 Danes and Norwegians 18 Danish power in Ireland 19 Its limits 21 Revival of the Celts 22 Brian Borumha 23 Battle of Clontarf 28 Conversion of the Danes 29 Superiority of their civilisation 30 Brian's monarchy not permanent 31 Danish Christianity in Ireland 32 Conflict between Canterbury and Armagh 33 Papal supremacy fully established 34 CHAPTER III. THE REIGN OF HENRY II. Ireland given to England by the Popes 37 First interference of Henry II. 39 An Anglo-Norman party in Ireland 40 Strongbow 41 Anglo-Norman invasion 42 Henry II. in Ireland 47 Difficulties of the invaders 49 Henry was unable to carry out his own policy 52 An Irish kingdom contemplated 54 Viceroyalty of John 55 No conquest of Ireland under Henry II. 56 CHAPTER IV. FROM JOHN'S VISIT IN 1210 TO THE INVASION BY THE BRUCES IN 1315. John Lord of Ireland 58 King John in Ireland 59 Leinster divided after Strongbow's death 61 The De Burgos in Connaught 61 The colony declines under Henry III. 62 Results of Edward I.'s policy 64 The Bruces invade Ireland 65 CHAPTER V. FROM THE INVASION OF THE BRUCES TO THE YEAR 1346.