The Wealth of Nations by Part 2 Chapter 2 Page 129

any difference in the price of their goods when they sold them for a colony paper, and when they sold them for gold and silver; a regulation equally tyrannical, but much less effectual than that which it was meant to support.

A positive law may render a shilling a legal tender for guinea, because it may direct the courts of justice to discharge the debtor who has made that tender. But no positive law can oblige a person who sells goods, and who is at liberty to sell or not to sell as he pleases, to accept of a shilling as equivalent to a guinea in the price of them. Notwithstanding any regulation of this kind, it appeared by the course of exchange with Great Britain, that a hundred pounds sterling was occasionally considered as equivalent, in some of the colonies, to a hundred and thirty pounds, and in others to so great