From their battlefield they could see the sea on either hand, stretching far inland northward and southward; across these arms of the sea rose other headlands, more distant, the armies of hills along them fading from green to purple, from purple to clear blue. But the De Danaans had burned their boats; they sought refuge rather by land, retreating northward till they came to the shelter of the great central woods. The Sons of Milid pursued them, and, overtaking them at Tailten on the Blackwater, some ten miles northwest of Tara, they fought another battle; after it, the supremacy of the De Danaans definitely passed away. Yet we have no reason to believe that, any more than the Fomorians or Firbolgs, the De Danaans ceased to fill their own place in the land. They seem, indeed, to have been preponderant in the north, and in all likelihood they hold their own there even now; for every addition to our knowledge shows us more and more how tenacious is the life of races, how firmly they cling to their earliest dwellings. And though we read of races perishing before invaders, this is the mere boasting of conquerors; more often the newcomers are absorbed among the earlier race, and nothing distinctive remains of them but a name. We have abundant evidence to show that at the present day, as throughout the last three thousand years, the four races we have described continue to make up the bulk of our population, and pure types of each still linger unblended in their most ancient seats; for, though races mingle, they do not thereby lose their own character. The law is rather that the type of one or other will come out clear in their descendants, all undefined forms tending to disappear. Nor did any subsequent invasion add new elements; for as all northern Europe is peopled by the same few types, every newcomer,--whether from Norway, Denmark, Britain or Continental Europe,--but reinforced one of these earlier races. Yet even where the ethnical elements are alike, there seems to be a difference of destiny and promise--as if the very land itself brooded over its children, transforming them and molding them to a larger purpose. The spiritual life of races goes far deeper than their ethnic history.