But in the course of the period within which the Numan calendar was drawn up, this community of patrician burghers began to suffer certain changes. A population of "outsiders," as in so many Greek cities, had gained admittance to the site of Rome, though not into its political and religious organism.[471] So solid a city, in such an important position, was sure to attract such settlers, whether from the Latins dwelling about it, or from the Etruscans on the north, or the Greek cities along the coast southwards and in Sicily. The Latins were, of course, of the same stock as the Romans, and already in some loose political relation to them; and as each Latin city was open, like Rome, to Greek and Etruscan influences, we should probably see in Latium an indirect channel of communication between those peoples and Rome, to be reckoned in addition to the direct and obvious one. As Dr. J. B. Carter has well said,[472] "the Latins, becoming rapidly inferior to Rome, were enabled to do her at least this service, that of absorbing the foreign influences which came, and in certain cases of Latinising them, and thus transmitting them to Rome in a more or less assimilated condition." As Dr. Carter has been the first to explain the arrival of these new religious influences to English readers, I shall in what follows closely follow his footsteps. They indicate and also reflect a change from agricultural economy and habits to a society interested in trade and travel: I say interested, because we cannot be quite sure how far the old Romans engaged in such pursuits themselves, as well as admitting from outside those who did, with their worships. They indicate also the growth of an industrial population, organised in gilds, as in the Middle Ages; here beyond doubt the workers were mainly of native birth. Lastly, they indicate an advance in military efficiency and, as a result of this military progress, some change in the relation of Rome to her fellow-communities of Latium.