The last ten years of the eighth century were very bad ones for Ireland. Then for the first time the black Viking ships were to be seen sweeping shore-wards over the low grey waves of the Irish Channel, laden with Picts, Danes, and Norsemen, "people," says an old historian, "from their very cradles dissentious, Land Leapers, merciless, soure, and hardie." They descended upon Ireland like locusts, and where-ever they came ruin, misery, and disaster followed.
Their first descent appears to have been upon an island, probably that of Lambay, near the mouth of what is now Dublin harbour. Returning a few years later, sixty of their ships, according to the Irish annalists, entered the Boyne, and sixty more the Liffy. These last were under the command of a leader who figures in the annals as Turgesius, whose identity has never been made very clear, but who appears to be the same person known to Norwegian historians as Thorkels or Thorgist.
Whatever his name he was undoubtedly a bad scourge to Ireland. Landing in Ulster, he burned the cathedral of Armagh, drove out St. Patrick's successors, slaughtered the monks, took possession of the whole east coast, and marching into the centre of the island, established himself in a strong position near Athlone.
Beyond all other Land Leapers, this Thorgist, or Turgesius, seems to have hated the churches. Not content with burning them, and killing all priests and monks he could find, his wife, we are told, took possession of the High Altar at Clonmacnois, and used it as a throne from which to give audience, or to utter prophecies and incantations. He also exacted a tribute of "nose money," which if not paid entailed the forfeit of the feature it was called after. At last three or four of the tribes united by despair rose against him, and he was seized and slain; an event about which several versions are given, but the most authentic seems to be that he was taken by stratagem and drowned in Lough Owel, near Mullingar, in or about the year 845.
He was not, unfortunately, the last of the Land Leapers! More and more they came, sweeping in from the north, and all seem to have made direct for the plunder of the monasteries, into which the piety of centuries had gathered most of the valuables of the country. The famous round towers, or "Clocthech" of Ireland, have been credited with a hundred fantastic origins, but are now known not to date from earlier than about the eighth or ninth century, are always found in connection with churches or monasteries, and were unquestionably used as defences against these northern invaders. At the first sight of their unholy prows, rising like water snakes above the waves, all the defenceless inmates and refugees, all the church plate and valuables, and all sickly or aged brothers were hurried into these monastic keeps; the doors--set at a height of from ten to twenty feet above the ground--securely closed, the ladders drawn up, food supplies having been no doubt already laid in, and a state of siege began.