RATH AT LEIGHLIN, CARLOWThe Battle of Dundalk—The Danes supposed to be Christianized—Brian Boroimhé and his Brother Mahoun—The Dalcassians fight the Danes—Mahoun is assassinated—Brian revenges his Brother's Murder—Malachy's Exploits against the Danes—Malachy and Brian form a Treaty and fight the Danes—Malachy wins "the Collar of Gold"—Brian's "Happy Family" at Kincora—He usurps the Supreme Power, and becomes Monarch of Ireland—Remote Causes of the Battle of Clontarf—Gormflaith is "grim" with Brian—Blockade of Dublin—The Danes prepare for a Fierce Conflict—Brian prepares also—The Battle of Clontarf—Disposition of the Forces—Brian's Death—Defeat of the Danes.CHAPTER XIII.