Each king, of whatever grade, should, according to law, have at least three chief residences; and he lived in them by turns, as suited his fancy or convenience. Nearly all those old palaces are known at the present day; and in most of them the ramparts and mounds are still to be seen, more or less dilapidated after the long lapse of time. The ruins of the most important ones--such as we see them now--are described in some detail in my two Social Histories of Ancient Ireland; but here our space will not permit us to mention more than a few. The most important of all is Tara, the chief residence of the over-kings, which is situated on the summit of a gentle green hill, six miles from Navan in Meath, and two miles from the Midland Railway station of Kilmessan. The various mounds, circular ramparts, and other features are plainly marked on the plan given at the beginning of this book; and anyone who walks over the hill with the plan in his hand can easily recognise them. Next to Tara in celebrity was the palace of Emain or Emania, the residence of the kings of Ulster, and the chief home of Concobar Mac Nessa and the Red Branch Knights. The imposing remains of this palace, consisting of a great mound surrounded by an immense circular rampart and fosse half obliterated, the whole structure covering about eleven English acres, lie two miles west of Armagh. Another Ulster palace, quite as important as Emain, was Ailech, the ruins of which are situated in County Donegal, on the summit of a hill 800 feet high, five miles north-west from Derry. It is a circular stone fortress of dry masonry, still retaining its old name in the form of “Greenan-Ely.” The chief palace of the kings of Connaught was Croghan, the old fort of which lies three miles from Tulsk in Roscommon. The most important residence of the Leinster kings was Aillenn, now called Knockaulin, an immense fort surrounding the summit of a hill near Kilcullen in Kildare. Besides these there are the Munster palaces, the Rock of Cashel, Kincora at Killaloe, Bruree in Limerick, and Caher in Tipperary: also we have Naas in Kildare, Dunlavin in Wicklow, Dinnree in Carlow, and many others. CHAPTER II. HOW THE WARLIKE OLD IRISH CONQUERED FOREIGN LANDS. From the remotest times the Irish had a genius for war and a love of fighting; and if it fell within the scope of this narrative, it would be easy to show that these features in our character have come down to the present day. For good or for bad, we are, and always have been, a fighting race.