The Wealth of Nations by Part 5 Chapter 2 Page 10

amassing any treasure, invented a method of lending, not money indeed, but what is equivalent to money, to its subjects. By advancing to private people at interest, and upon land security to double the value, paper bills of credit to be redeemed fifteen years after their date, and in the meantime made transferable from hand to hand like bank notes, and declared by act of assembly to be a legal tender in all payments from one inhabitant of the province to another, it raised a moderate revenue, which went a considerable way towards defraying an annual expense of about L4500, the whole ordinary expense of that frugal and orderly government.

The success of an expedient of this kind must have depended upon three different circumstances; first, upon the demand for some other instrument of commerce besides gold and silver money;