from Hellas that the enquirer must be cautious as to how far he may be dealing with material of true Italian or merely adventitious origin. As we are concerned rather with the origin than with the later developments of weight-systems, it is plain that for dealing with our principal objects the Italian systems present us with no special aid. The late period (268 B.C.) at which the Romans struck silver coins places us at a still further disadvantage if we start with their system. Greece on the other hand presents us not only with abundant literary records of great antiquity, some of them descending from an age which knew not the uses of coined money, but also with thousands of inscriptions cut in marble or bronze, many of which contain data of great value for dealing with the history of currency and weight, and finally presents us with vast series of coins from which we can learn empirically the coin standards employed in various times and places. But it is the very wealth of material that is in some degree here our difficulty. The special feature of Greek national life was its numerous autonomous states. There was no central authority with a mint which issued coins for a whole empire as was virtually the case in the great Persian kingdom, and at a later period in the Macedonian empire of Alexander the Great. In the palmy days of Hellas each petty state issued its own coinage, following in its silver and copper mintages whatever standard or module it pleased.
To commence our constructive part with a country where we are confronted with such an array of separate coinages and of diverse standards would be unwise if it were possible to start from some region where there was a single central authority, and consequently less diversity of standards. We are thus led to choose either Egypt or Babylonia as our starting point. The former presents to us a system less developed and more simple than the latter. In fact we are tolerably well justified, in view of recent discussion, in regarding all that is more complex in the system of Egypt as borrowed from Babylonia. Yet it must not be supposed that we escape all difficulties in thus starting with Egypt. If in Hellas we found ourselves embarrassed by the wealth of coinages, in Egypt on the