It is said, also, that Numa built the temple of Vesta, which was intended for a repository of the holy fire, of a circular form, not to represent the figure of the earth, as if that were the same as Vesta, but that of the general universe, in the centre of which the Pythagoreans place the element of fire, and give it the name of Vesta and the unit; and do not hold that the earth is immovable, or that it is situated in the centre of the globe, but that it keeps a circular motion about the seat of fire, and is not in the number of the primary elements; in this agreeing with the opinion of Plato, who, they say, in his later life, conceived that the earth held a lateral position, and that the central and sovereign space was reserved for some nobler body.
There was yet a farther use of the priests, and that was to give people directions in the national usages at funeral rites. Numa taught them to regard these offices, not as a pollution, but as a duty paid to the gods below, into whose hands the better part of us is transmitted; especially they were to worship the goddess Libitina, who presided over all the ceremonies performed at burials; whether they meant hereby Proserpina, or, as the most learned of the Romans conceive, Venus, not inaptly attributing the beginning and end of man's life to the agency of one and the same diety. Numa also prescribed rules for regulating the days of mourning, according to certain times and ages. As, for example, a child of three years was not to be mourned for at all; one older, up to ten years, for as many months as it was years old; and the longest time of mourning for any person whatsoever was not to exceed the term of ten months;which was the time appointed for women that lost their husbands to continue in widowhood. If any married again before that time, by the laws of Numa, she was to sacrifice a cow big with calf.
Numa, also, was founder of several other orders of priests, two of which I shall mention, the Salii and the Fecials, which are among the clearest proofs of the devoutness and sanctity of his character.
These Fecials, or guardians of peace, seem to have had their name from their office, which was to put a stop to disputes by conference and speech; for it was not allowable to take up arms until they had declared all hopes of accommodation to be at an end, for in Greek, too, we call it peace when disputes are settled by words, and not by force. The Romans commonly despatched the Fecials, or heralds, to those who had offered them injury, requesting satisfaction; and, in case they refused, they then called the gods to witness, and, with imprecations upon themselves and their country should they be acting unjustly, so declared war; against their will, or without their consent, it was lawful neither for soldier nor king to take up arms;the war was begun with them, and when they had first handed it over to the commander as a just quarrel, then his business was to deliberate of the manner and ways to carry it on. It is believed that the slaughter and destruction which the Gauls made of the Romans was a judgment on the city for neglect of this religious proceeding; for that when these barbarians besieged the Clusinians, Fabius Ambustus was despatched to their camp to negotiate peace for the besieged; and, on their returning a rude refusal, Fabius imagined that his office of ambassador was at an end, and, rashly engaging on the side of the Clusinians, challenged the bravest of the enemy to a single combat. It was the fortune of Fabius to kill his adversary, and to take his spoils; but when the Gauls discovered it, they sent a herald to Rome to complain against him; since, before war was declared, he had, against the law of nations, made a breach of the peace. The matter being debated in the senate, the Fecials were of opinion that Fabius ought to be consigned into the hands of the Gauls; but he, being forewarned of their judgment, fled to the people, by whose protection and favour he escaped the sentence. On this, the Gauls marched with their army to Rome, where having taken the capitol, they sacked the city. The particulars of all which are fully given in the history of Camillus.