Chapter VII The Northern Scourge
Ireland divided into five kingdoms—The Ard-Reagh—Arrival of Vikings—Thorgist or Turgesius?—Later Viking invaders—The round towers—Dublin founded—Hatred between the two races.
Chapter VIII Brian of the Tribute
Two deliverers—Defeat of the Vikings at Sulcost—Brian becomes king of Munster—Seizes Cashel—Overcomes Malachy—Becomes king of Ireland—Celtic theory of loyalty—Fresh Viking invasion—Battle of Clontarf—Death of Brian Boru.