In my opinion no stress, or very little, can be laid upon the argument from topography, which weighed so heavily with Keating, O'Donovan, and O'Curry, for if it is admitted at all it proves too much. If it proves the objective existence of Finn and of Cuchulain, so does it that of Dana, "the mother of the gods," and of divinities by the score. Besides the Gaels brought their topographical nomenclature with them to Alba, and places named from Finn and the Fenians, are nearly as plentiful there as in Ireland. Wherever the early Gaels went they took with them their heroic legends, and wherever they settled place-names relating to their legends which were so much a part of their intellectual life, grew up round them too. Something of the same kind may be seen in Greece--a land which presents so many and so striking analogies to that of the Gael; for wherever a Grecian colony settled, east or west, it was full of memorials of the legendary past, and Jasonia, or temples of Jason, and other memorials of the voyage of the Argonauts, are to be found from Abdêra to Thrace, eastward along the coast of the Euxine and in the heart of Armenia and Media, just as memorials of the flight of Diarmuid and of Gráinne from before Finn mac Cool may be found wherever the Gael are settled in Ireland, in Scotland, or the Isles. Having come to the conclusion that Irish topography is useless for proving the genuineness of past history, let us look at Irish genealogy. When the Mac Carthys, descendants of Mac Carthy Mór, trace themselves through Oilioll Olum, king of Ireland in the second century, to Eber Finn, son of Milesius; when the O'Briens of Thomond trace themselves to the same through Oilioll Olum's second son; when the O'Carrolls of Ely trace themselves to the same through Cian, the third son; when the O'Neills trace themselves back through Niall of the Nine Hostages, and Conn of the Hundred Battles to Eremon, son of Milesius; when the O'Driscolls trace themselves to Ith, who was uncle of Milesius; when the Magennises trace themselves through Conall Cearnach, the Red Branch hero, back to Ir, the son of Milesius; and when every sept and name and family and clan in Ireland fit in, and even in our oldest manuscripts have always fitted in, each in its own place, with universally mutual acknowledgment and unanimity, each man carefully counting his ancestors through their hundredfold ramifications, and tracing them back first to him from whom they get their surname, and next to him from whom they get their tribe name, and from thence to the founder of their house, who in his turn grafts on to one of the great stems (Eremonian, Eberian, Irian, or Ithian)[3]; and when not only political friendships and alliances, but the very holding of tribal lands, depended upon the strict registration and observance of these things--we ask again do such facts throw any light upon the credibility of early Irish history and early Irish records?