21.

The following, mentioned by Polvcletus, are perhaps customary practices:

At Susa each king builds in the citadel, as memorials of the administration of his government, a dwelling for himself, treasure-houses, and magazines for tribute collected (in kind).

From the sea-coast they obtain silver, from the interior the[Pg 140]
[CAS. 735] produce of each province, as dyes, drugs, hair, wool, or anything else of this sort, and cattle. The apportionment of the tribute was settled by Darius [Longimanus, who was a very handsome person with the exception of the length of his arms, which reached to his knees].470 The greater part both of gold and silver is wrought up, and there is not much in coined money. The former they consider as best adapted for presents, and for depositing in store-houses. So much coined money as suffices for their wants they think enough; but, on the other hand, money is coined in proportion to what is required for expenditure.471