The only materials available in the case of the earliest Rome are (1) the calendar which I was explaining in the last lecture, which gives us the names of the festivals of the religious year; (2) the names of the deities concerned in these festivals, so far as we know them from later additions to the calendar, from Roman literature, and from evidence, chiefly epigraphical, of the names of deities among kindred Italian peoples; (3) the fragments of information, now most carefully collected and sifted, about what the Romans did in the worship of their deities. The names and order of the festivals, the names of the deities themselves, the cult, or detail of worship, including priesthoods and holy places,--these are the only real materials we possess, and our only safe guides. To trust to legends is fatal, because such legends as there were in Italy were never written down until the Greeks turned their attention to them, colouring them with their own fancy and with reminiscences of their own mythology. For example, no sane investigator would now make use of the famous story told by Ovid and Plutarch about Numa's interview with Jupiter, and the astute way in which he deceived the god, as an illustration of the Roman's ideas of the divine; we know that it can be traced back to the greatest liar among all Roman annalists,[219] that it was in part derived from a Greek story, and in part invented to explain a certain piece of ritual, the _procuratio fulminis_. Even what was done in the cult must be handled with knowledge and discretion. Dr. Frazer has a theory that the Roman kings personated Jupiter, and uses as evidence of this the fact that in the triumph the triumphator was dressed after the fashion of the statue of the god in the Capitoline temple, with his face reddened with _minium_: forgetting that the temple, its cult and its statue, all date from the very end of the period of the kingship, and were the work of an Etruscan monarch, almost beyond doubt. There may be truth in his theory, but this is not the way to prove it; this is not the way to arrive at a true understanding of Roman religious ideas.