Sir James Steuart, An Inquiry into the Principles of Political Oeconomy…
“ Variations upon the rate of agio, of 2 or 3 per cent. perhaps more, are frequent and familiar. The demands of trade, for coin or credit, are so fluctuating, that such variations are unavoidable; but were there an overcharge of bank credit, which no power could diminish, that overcharge would quickly be perceived; because the fluctuations of the agio would entirely cease; as the balance of a scale, nearly in equilibrio, ceases from a total overcharge on one side. ”
