This higher value of money will not be indicated by the exchange; bills may continue to be negotiated at par, although the prices of corn and labour should be 10, 20, or 30 per cent. higher in one country than another. Under the circumstances supposed, such a difference of prices is the natural order of things, and the exchange can only be at par when a sufficient quantity of money is introduced into the country excelling in manufactures, so as to raise the price of its corn and labour. If foreign countries should prohibit the exportation of money, and could successfully enforce obedience to such a law, they might indeed prevent the rise in the prices of the corn and labour of the manufacturing country; for such rise can only take place after the influx of the precious metals, supposing paper money not to be used; but they could not prevent the exchange from being very unfavourable to them. If England were the manufacturing country, and it were possible to prevent the importation of money, the exchange with France, Holland, and Spain, might be 5, 10, or 20 per cent. against those countries. Whenever the current of money is forcibly stopped, and when money is prevented from settling at its just level, there are no limits to the possible variations of the exchange. The effects are similar to those which follow, when a paper money, not exchangeable for specie at the will of the holder, is forced into circulation. Such a currency is necessarily confined to the country where it is issued: it cannot, when too abundant, diffuse itself generally amongst other countries. The level of circulation is destroyed, and the exchange will inevitably be unfavourable to the country where it is excessive in quantity: just so would be the effects of a metallic circulation, if by forcible means, by laws which could not be evaded, money should be detained in a country, when the stream of trade gave it an impetus towards other countries. When each country has precisely the quantity of money which it ought to have, money will not indeed be of the same value in each, for with respect to many commodities it may differ 5, 10, or even 20 per cent., but the exchange will be at par. One hundred pounds in England, or the silver which is in 100_l._, will purchase a bill of 100_l._, or an equal quantity of silver in France, Spain, or Holland. In speaking of the exchange and the comparative value of money in different countries, we must not in the least refer to the value of money estimated in commodities, in either country. The exchange is never ascertained by estimating the comparative value of money in corn, cloth, or any commodity whatever, but by estimating the value of the currency of one country, in the currency of another.