John Stuart Mill,
Principles of Political Economy
(1871)
“ When the gold or silver has all gone from circulation, and an equal quantity of paper has taken its place, suppose that a still further issue is superadded. The same series of phenomena recommences: prices rise, among the rest the prices of gold and silver articles, and it becomes an object as before to procure coin in order to convert it into bullion. There is no longer any coin in circulation; but if the paper currency is convertible, coin may still be obtained from the issuers, in exchange for notes. ”
