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2 .5<br />
It is probably only the draft <strong>of</strong> a document, as final financial records were made on<br />
leather. However, in this case too, this ostracon could have been a tax document<br />
– a reminder to pay a debt to a certain person (Navbun?), or a tax accounting<br />
memorandum kept by a special <strong>of</strong>ficial.<br />
Dalverzintepa, like the whole <strong>of</strong> Northern Bactria, was apparently conquered by<br />
the Sassanids in the mid-3rd century AD, and there is nothing surprising about the<br />
presence <strong>of</strong> the Sassanid administration, in addition to merchants arriving from Iran.<br />
The evidence cited is still sparse, but it reflects the existence <strong>of</strong> an established<br />
revenue collection system in ancient Central <strong>Asia</strong>, which was further developed in<br />
the early and late medieval period.<br />
Money<br />
Two main centres from which metal money originated have been identified.<br />
Firstly, the Graeco-Lydian centre, which unified the Greek cities on the Ionian coast<br />
<strong>of</strong> <strong>Asia</strong> Minor, ruled by Lydian kings at the time, and Aegina island. The Milesian<br />
monetary system is thought to be the earliest among four monetary systems: Milesian,<br />
Euboean, Corinthian, Phocaean, dating from the 7th and even 8th century BC.<br />
Recent evidence suggests that Lydian coinage did not emerge before 640–630 BC<br />
and the oldest surviving coins were minted around 615 BC.<br />
The first coins were minted from electrum, a natural alloy <strong>of</strong> silver and gold. The<br />
obverse <strong>of</strong> the coins was stamped with a lion’s head and a bull’s head, verifying that<br />
the coins had the correct weight and were <strong>of</strong> good quality. This made it possible for<br />
the first time to trade without needing to weigh the metal.<br />
Secondly, the Chinese centre. Here, curious knife-shaped and spade-shaped coins<br />
first appeared in the small kingdom <strong>of</strong> Shu, in north-eastern China, in the 7th or<br />
early 6th century BC. Circular coins with a hole in the middle were also occasionally<br />
produced at this time. Later, from the early Han era onwards, a traditional type <strong>of</strong><br />
Chinese coin with a square hole and with hieroglyphs on both sides emerged. All<br />
early Chinese coins were bronze, and cast in moulds <strong>of</strong> stone and clay. Gold and silver<br />
coins were not produced in either the early or the later stages <strong>of</strong> the Chinese coinage<br />
system.<br />
Ancient Persian and Ancient Indian coinage systems are cited as other examples<br />
<strong>of</strong> independent centres <strong>of</strong> the creation <strong>of</strong> metal money, but they probably both<br />
originated under the influence <strong>of</strong> Greek centres.<br />
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