Cormac, a scholar, and, as became his calling, a man of peace, was thus, by virtue of his accession, the representative of the old quarrel between his predecessors and the dominant race of kings. All Munster asserted that it was never the intention of their common ancestors to subject the southern half of Erin to the sway of the north; that Eber and Owen More had resisted such pretensions when advanced by Eremhon and Conn of the Hundred Battles; that the _esker_ from Dublin to Galway was the true division, and that, even admitting the title of the Hy-Nial king as Ard-Righ, all the tribes south of the _esker_, whether in Leinster or Connaught, still owed tribute by ancient right to Cashel. Their antiquaries had their own version in of "the Book of Rights," which countenanced these claims to co-equal dominion, and their Bards drew inspiration from the same high pretensions. Party spirit ran so high that tales and prophecies were invented to show how St. Patrick had laid his curse on Tara, and promised dominion to Cashel and to Dublin in its stead. All Leinster, except the lordship of Ossory—identical with the present diocese of the same name-was held by the _Brehons_ of Cashel to be tributary to their king; and this _Borooa_ or tribute, abandoned by the monarchs at the intercession of Saint Moling, was claimed for the Munster rulers as an inseparable adjunct of their southern kingdom. The first act of Flan Siona, on his accession, was to dash into Munster, demanding hostages at the point of the sword, and sweeping over both Thomond and Desmond with irresistible force, from Clare to Cork. With equal promptitude he marched through every territory of Ulster, securing, by the pledges of their heirs and _Tanists_, the chiefs of the elder tribes of the Hy-Nial. So effectually did he consider his power established over the provinces, that he is said to have boasted to one of his hostages, that he would, with no other attendants than his own servants, play a game of chess on Thurles Green, without fear of interruption. Carrying out this foolish wager, he accordingly went to his game at Thurles, and was very properly taken prisoner for his temerity, and made to pay a smart ransom to his captors. So runs the tale, which, whether true or fictitious, is not without its moral. Flan experienced greater difficulty with the tribes of Connaught, nor was it till the thirteenth year of his reign (892) that Cathal, their Prince, "came into his house," in Meath, "under the protection of the clergy" of Clonmacnoise, and made peace with him. A brief interval of repose seems to have been vouchsafed to this Prince, in the last years of the century; but a storm was gathering over Cashel, and the high pretensions of the Eugenian line were again to be put to the hazard of battle.