The Wealth of Nations by Part 2 Chapter 2 Page 126

and Dumfries would sometimes be four per cent against Dumfries, though this town is not thirty miles distant from Carlisle. But at Carlisle, bills were paid in gold and silver; whereas at Dumfries they were paid in Scotch bank notes, and the uncertainty of getting those bank notes exchanged for gold and silver coin had thus degraded them four per cent below the value of that coin. The same Act of Parliament which suppressed ten and five shilling bank notes suppressed likewise this optional clause, and thereby restored the exchange between England and Scotland to its natural rate, or to what the course of trade and remittances might happen to make it.

In the paper currencies of Yorkshire, the payment of so small a sum as a sixpence sometimes depended upon the condition that the holder of the note should bring the change of