John Stuart Mill,
Principles of Political Economy
(1871)
“ A bill of exchange, when merely discounted, and kept in the portfolio of the discounter until it falls due, does not perform the functions or supply the place of money, but is itself bought and sold for money. It is no more currency than the public funds, or any other securities. But when a bill drawn upon one person is paid to another (or even to the same person) in discharge of a debt or a pecuniary claim, it does something for which, if the bill did not exist, money would be required: it performs the functions of currency. ”
