Next let us take the money of Macedonia, where there was an abundant coinage of both gold and silver. The Pelasgian tribe of Bisaltae, and the Thracian Edonians and Odomanti, had during the half century which preceded the Persian wars all struck silver on the so-called Phoenician standard. It is commonly supposed that they obtained this standard from the important town of Abdera, which at the same period employed a like standard, and it is suggested that Abdera had borrowed it from her mother Teos, who had borrowed it from Miletus and the other great towns of the Ionian seaboard, among which it was especially employed for electrum. But unfortunately, whilst the types of Teos and Abdera are the same (a seated Griffin), the staters of Teos weigh only 186 grs., which is the Aeginetic, not the Phoenician (220 grs.) standard. Shortly after the overthrow of the Persian host Alexander I. of Macedon acquired the land of the Bisaltae along with the rich silver mines, which were said to produce for him a talent daily, and he adopted both the types and standard of the Bisaltian silver coinage, only substituting his own name for that of the Bisaltae. During the century which elapsed between Alexander I. and the accession of the famous Philip II. the coinage of Macedon and that of Abdera followed the same course in each case; the Phoenician standard of 230 grs. gave way to the so-called Babylonian or Persian of about 170 grs. Again, it has been suggested that Abdera influenced the neighbouring communities in this change. But when Philip came to the throne he returned to the Phoenician standard for silver, and when for the first time in Macedon he issued a bountiful coinage of gold staters, they were struck on the ancient gold unit, the so-called Euboic standard of 130 grs. But hardly had Philip slept with his fathers, and Alexander reigned in his stead, when a need was felt for a change in the silver standard. Accordingly the latter in the early years of his reign began, and continued to his death, to strike his silver on the same standard as his gold. Let us now study the lessons to be learned from this history of currency. There can be no reasonable doubt that the ox-unit or _stater_ was the unit by which gold was estimated from first to last in that region. Unless it already existed Philip would not have employed it for his gold coinage at a time when he was making changes in his silver, but would have assimilated his gold to his silver standard. But, as before remarked, just because gold was not coined anywhere in Greece until the closing years of the 5th century, and in all transactions it passed as bullion, so much the stronger was the reason for keeping its weight-unit unchanged. But was the standard of 220 grs. really an imported Phoenician, or was it not rather one arrived at in that region by the natives themselves owing to the relations then existing between silver and gold? It is evident from the account given