Respecting the internal intercourse of the Italians with each other our written authorities are silent; coins alone furnish some information.  We have already mentioned(28) that in Italy, with the exception of the Greek cities and of the Etruscan Populonia, there was no coinage during the first three centuries of Rome, and that cattle in the first instance, and subsequently copper by weight, served as the medium of exchange.  Within the present epoch occurred the transition on the part of the Italians from the system of barter to that of money; and in their money they were naturally led at first to Greek models.  The circumstances of central Italy led however to the adoption of copper instead of silver as the metal for their coinage, and the unit of coinage was primarily based on the previous unit of value, the copper pound; hence they cast their coins instead of stamping them, for no die would have sufficed for pieces so large and heavy.  Yet there seems from the first to have been a fixed ratio for the relative value of copper and silver (250:1), and with reference to that ratio the copper coinage seems to have been issued; so that, for example, in Rome the large copper piece, the -as-, was equal in value to a scruple (1/288 of a pound) of silver.  It is a circumstance historically more remarkable, that coining in Italy most probably originated in Rome, and in fact with the decemvirs, who found in the Solonian legislation a pattern for the regulation of their coinage; and that from Rome it spread over a number of Latin, Etruscan, Umbrian, and east-Italian communities, —­a clear proof of the superior position which Rome from the beginning of the fourth century held in Italy.  As all these communities subsisted side by side in formal independence, legally the monetary standard was entirely local, and the territory of every city had its own monetary system.  Nevertheless the standards of copper coinage in central and northern Italy may be comprehended in three groups, within which the coins in common intercourse seem to have been treated as homogeneous.  These groups are, first, the coins of the cities of Etruria lying north of the Ciminian Forest and those of Umbria; secondly, the coins of Rome and Latium; and lastly, those of the eastern seaboard.  We have already observed that the Roman coins held a certain ratio to silver by weight; on the other hand we find those of the east coast of Italy placed in a definite proportional relation to the silver coins which were current from an early period in southern Italy, and the standard of which was adopted by the Italian immigrants, such as the Bruttians, Lucanians, and Nolans, by the Latin colonies in that quarter, such as Cales and Suessa, and even by the Romans themselves for their possessions in Lower Italy.  Accordingly the inland traffic of Italy must have been divided into corresponding provinces, which dealt with one another like foreign nations.