It is indeed true that the one great difficulty of our subject lies in the nature of the evidence; and it is one which we can never hope entirely to overcome. We have always to bear in mind that the Romans produced no literature till the third century B.C.; and the documentary evidence that survives from an earlier age in the form of inscriptions, or fragments of hymns or of ancient law (such as the calendar of which I spoke just now), is of the most meagre character, and usually most difficult to interpret. Thus the Roman religion stands alone among the religions of ancient civilisations in that we are almost entirely without surviving texts of its forms of prayer, of its hymns or its legends;[11] even in Greece the Homeric poems, with all the earliest Greek literature and art, make up to some extent for the want of that documentary evidence which throws a flood of light on the religions of Babylon, Egypt, the Hindus, and the Jewish people. We know in fact as little about the religion of the old Italian populations as we do about that of our own Teutonic ancestors, less perhaps than we do about that of the Celtic peoples. The Romans were a rude and warlike folk, and meddled neither with literature nor philosophy until they came into immediate contact with the Greeks; thus it was that, unfortunately for our purposes, the literary spirit, when at last it was born in Italy, was rather Greek than Roman. When that birth took place Rome had spread her influence over Italy,--perhaps the greatest work she ever accomplished; and thus the latest historian of Latin literature can venture to write that "the greatest time in Roman history was already past when real historical evidence becomes available."[12]