It was only when the exact methods of palæontology and geology had been brought to bear with all their rigour on the study of ancient man by savants schooled in natural science that solid results were obtained. On this sure foundation the science of history now continues building, and uses, even for the later periods, so far as recorded information is not available, and to supplement it, the same methods of palæontology and natural science which were applied so successfully to the earliest stages of the evolution of mankind. [Sidenote: Time-Table of Prehistoric Periods] The first point is to collect the relics of the periods of the evolution of culture which follow on the later Stone Age, and to separate them according to geological strata, uninfluenced by those older pseudo-historic fancies by which the deepening of our historical knowledge has so long been hindered. By carefully separating and tracing the earth’s strata till we come to those that furnish remains of times recorded in history, it has been possible to establish first a relative chronology of the so-called later prehistoric periods of Central Europe, whose offshoots pass immediately into recorded history. By digging, after the same method of palæontological science, through stratum after stratum in the oldest centres of culture, especially in the Mediterranean countries, and by arranging the products by strata--uninfluenced by historical hypotheses--after the same natural-science method of research which has produced such remarkable results in Central Europe, the most surprising conformity in the evolution of culture in widely remote regions has been shown. It was found that in the Mediterranean countries, and also in Egypt and Babylonia, forms of culture already belong to the time of real history which were first recognised in Central Europe as preliminary prehistoric stages of historical strata; so that it was possible also to establish an absolute historical chronology for those instead of the relative prehistoric one. [Sidenote: Europe’s Prehistoric Night] Thus times which, as regards Central Europe, were hitherto wrapped in prehistoric night are enlightened by history. Although, as regards Central and Northern Europe, we cannot name the peoples who were the bearers of those forms of culture, and although we disdain to give them a premature nomenclature of hypothetical names, yet their conditions of life and culture and the progressive development of these, in manifold contact and intercourse with neighbouring and even far remote historic peoples and periods, have risen from the darkness of thousands of years; and their relation in time to the latter has been recognised.