Note 2 — Chapter VI · Gold, and How they Came to Use It.

This purchasing power was at first by no means fixed or constant. So long as there was but a small quantity of gold, its purchasing power was large. As the quantity extracted from the rocks or washed from the sands became greater, and the wants of the people became more and more satisfied, its purchasing power or value decreased; and if the supply had continued, and the demand had been limited to the wants of the island exclusively, its value in time would have undoubtedly been no greater than copper or iron, and possibly not so great. But, very curiously, an abundant supply did not continue. That which was obtained first and with little labor proved to be the result of the decay and washing of the rocks through long ages; and when the readily accessible or surface deposits became exhausted, as was soon the case, the conditions determining the supply of gold became altogether different. On the one hand, there was no lack of gold. Instead of being a very scarce metal, as was for a time supposed, it was found to be so widely disseminated that the chemists and metallurgists readily detected traces of gold in almost every extensive bed of clay and sand they examined.2