Forty years ago, the Rev. Dr. Todd, who was then engaged in translating the old book mentioned above, in order to test the chronicler’s accuracy, put this question to the Rev. Dr. Haughton, a great science scholar, of Trinity College, Dublin:--At what time was there high tide in Dublin Bay on the 23rd April, 1014? After a laborious calculation, Dr. Haughton found that the tide was at its height that morning at half-past five o’clock, just as the sun was coming over the horizon, and that the evening tide was in at fifty-five minutes past five: a striking confirmation of the truth of this part of the narrative. It shows, too, that the account was written by or taken down from an eye-witness of the battle. Dr. Haughton’s calculation--every figure--may now be seen in Dr. Todd’s published book. Little did the old annalist think, when penning his simple record, that after lying by unnoticed and forgotten on some obscure bookshelf for eight centuries, it was destined to be at last brought out under the broad light of science, and its accuracy fully tested and established. There are several other ways of testing the truth of our annals. One is by comparing them with the testimony of foreign writers of good standing. Events occurring in Ireland in those early ages are not often mentioned by British or Continental writers. Indeed they knew very little about Ireland, which was, in those times, especially as regards the Continent, a very remote place. But whenever they do notice Irish affairs, it may be said that they are always in agreement with the native records. In our Irish books we find accounts of events or customs, which some people--not knowing better--would be inclined to pronounce fabulous, but which we find recorded as sober history by certain great English and Continental historians. The colonisation of Scotland from Ireland, for instance, which was formerly doubted by many, is fully confirmed by the Venerable Bede. And to take another instance from the battle of Clontarf:--All the Irish chronicles state that a general rout of the Danes took place in the evening, and that there was an awful slaughter of them, for they were cut off from their fortress by the river Liffey, and from their ships by the high tide; while the infuriated Irish assailed them, front, flank, and rear. Now in the description of the battle by a Danish writer--the best possible authority in the case, as he had good reason to know what happened--there is a full confirmation of this. His record is simple and plain:--“Then flight broke out throughout all the Danish host.” The more the ancient historical records of Ireland are examined and tested, the more their truthfulness is made manifest. Their uniform agreement among themselves, and their accuracy, as tried by various tests, have drawn forth the acknowledgments of the greatest Irish scholars and archæologists that ever lived.