simplicity of ritual. Centuries later Herakles became known to the Romans through direct Greek channels, and it was recognised that this new Herakles was akin to the old Hercules, so that he too was called Hercules. There was nothing surprising in this to the Romans, because they considered it a matter of course that there should be found a parallel among their own gods for each Greek deity. They never understood the true state of affairs; it is doubtful whether they could have understood it: namely, that in almost all their other identifications of Roman and Greek deities, they were really doing violence to their own native gods by superimposing upon them the attributes of a deity with whom they had really nothing in common, whereas, in identifying the new Herakles with their old Hercules, they were doing a perfectly legitimate thing. For one who knows the true state of affairs there is something pathetically amusing in the fact that they really showed more delicacy in making their old (really originally Greek) Hercules into the new Greek Herakles-Hercules, than they did in throwing together Neptune and Poseidon, Mars and Ares, Diana and Artemis. As a matter of fact they always reverenced the old cult of the great altar, and never allowed the more sensational phases of Greek worship to be practised there, and put off into another quarter the temples which were built to Hercules under the various new attributes which the new Greek cult brought with it. These temples were placed, as was proper, outside the pomerium, in the southern part of the Campus Martius.

But to return to the simple Hercules and the Servian regime, the Roman state had now obtained a deity, of which, by the contagion of commerce, they already felt a need, a god of great power from whom came success in the practical undertakings of life. Hence he had a strong hold on the Romans whose practical side was undergoing a rapid development. The idea of trade was now represented in the religious world, it had received its divine sanction.

The other god, who came up from Magna Graecia and whose formal acceptance into the state-cult formed one of the earliest incidents in the breakdown of the old agricultural religion, was Castor, with his twin-brother Pollux, although brother Pollux was always an insignificant partner, so much so that the temple which was subsequently built to them both was referred to either as the temple of "Castor" alone or as the temple of "the Castors." At various points in the old Greek world we meet with a pair of brothers, at first not designated by individual names but merely named as a pair. Even these pair-names do not agree, but they represent all of them the same idea. Later when individual names are substituted for the general pair-name, these individual names also differ. They are gods of protection, and on the sea-coast—and most of Greece is sea-coast—they are especially helpful as rescuers from the dangers of the sea, and they are also very early and almost everywhere connected with horses. But in spite of their usefulness they are not very prominent, and it is doubtful whether they would ever have become famous, except for one of those little accidents which make the fortunes of gods as well as of men. It so happened that horses began to be used in warfare more than for the mere drawing of chariots; a primitive sort of cavalry came into being, produced by mounting heavy-armed foot-soldiers on horseback. With this cavalry the "Twin-Brothers" (Dios-kouroi = "Sons of Zeus"), especially Castor, became prominent. Just as the Greek merchants had taken Herakles with them when they set out to plant colonies in Southern Italy, so the heavy-mounted horsemen carried their god Castor with them wherever they went. The Italic tribes in their turn were quick to seize upon this idea of cavalry, and with it as an essential part went its divine patron, Castor. Thus the Castor-cult moved steadily northward, carried, as it were, on horseback. At last it reached Latium, and there the little town of Tusculum, afterwards so famous as the residence of Cicero, became in some unaccountable way an important cult-centre, and did for Castor what Tibur had done for Hercules, i.e. latinised him, so that Rome received him not as an alien but as one of her kin. There can be little doubt that the Roman cult actually did come from Tusculum, and that in its introduction into Rome, as in every other step on its march, it was connected with the reorganisation of the cavalry. This would seem to imply that Tusculum was famous for its cavalry and that Rome took the idea of it from her—statements for which we have unfortunately no other confirmation, though we have abundant proof of the cult at Tusculum and of Rome's close association with it.

Castor was thus the patron of the "horsemen" (equites) and his great day was July 15, when the horsemen's parade took place. Possibly this had been the date of the festival at Tusculum, a day especially appropriate because it was the Ides of the month, and the Ides were sacred to Juppiter, whose sons Castor and Pollux (Dios-kouroi) were supposed to be. It is extremely interesting in the light of this knowledge of the true state of affairs to see how legend later explained the coming of Castor and Pollux. It was an incident in the mythical war which was supposed to have taken place after the last Tarquin had been driven out, and the republic had been started. The adversaries of Rome, allied with Tarquin, notably Octavius Mamilius of Tusculum, fought against the Romans in the battle of Lake Regillus on July 15, B.C. 499. The Romans won, and the first news of victory was brought to Rome by the miraculous appearance of Castor and Pollux who were seen watering their horses in the Forum at the spring of Juturna. A temple on this spot was then vowed and fifteen years later, B.C. 484, it was completed and dedicated. Tusculum, July 15, and the dedication of the temple in B.C. 484 are seemingly the only historical facts in this legend; and long before B.C. 499 Castor was worshipped in Rome, especially on July 15. The site of his original worship was without doubt the same locality in the Forum where his temple was subsequently built, for it is an almost invariable rule that the earliest temples are built on the actual site of, or close to, the old altar or shrine which preceded the formal temple. Like Hercules therefore he was received inside the pomerium, and probably for a similar reason, because it was felt that he was a god of Tusculum, and hence a god of Rome's kinsfolk. We have an additional confirmation of this feeling in the way in which the later direct cult of Castor was treated. This cult, connecting Castor with healing and the interpretation of dreams, and emphasising his function as a rescuer from the dangers of the sea, would have been without meaning for the old Romans who worshipped him merely as a patron of horsemen and horsemanship. The new ideas seem to have had as their centre a later temple in the Circus Flaminius and thus Hercules and Castor may again be paralleled, since they have, each of them, an old cult-centre inside the pomerium, Hercules in the Forum Boarium, Castor in the Forum, and a later cult-centre, for more advanced ideas, in each case in the Circus Flaminius.

Although it was Greek influence which ultimately caused the destruction of Roman religion, and although the cults of Hercules and of Castor are the first definite effects of this influence, it cannot be said that the destruction had in any sense begun, because in their slow journey northward, and in their long residence at Tibur and