According to the law which I have already mentioned, as regulating the progress of knowledge, Political Economy, when, in the 17th century, it first attracted notice as a subject of separate study, was treated as an art. At that time human happiness was considered as dependent chiefly on wealth, and wealth, as I have previously remarked, was supposed to consist of gold and silver. The object which the political economist proposed to himself and to his reader, was the accumulation within his own country of the utmost possible amount of the precious metals. The questions which now agitate society, as to the distribution of wealth, were unregarded. All that was aimed at, was its acquisition and retention in a metallic form. As respects the countries possessing native deposits of the precious metals, the means of effecting this were supposed to be obvious and easy. They had only to promote the extraction of silver from mines, and that of gold from auriferous sands, and to prohibit the exportation of either. This was the policy of Spain and Portugal. The countries not possessing a native supply, could obtain it only by what was called a favourable balance of trade, that is to say, by exporting to a value exceeding that of their imports, and receiving the difference in money. And the money so acquired, they were taught to retain, by prohibiting its exportation. The prevailing opinion shows itself in the preamble of the 5 Rich. II. stat. 1. cap. 2., one among the many statutes and proclamations by which this prohibition was for centuries enforced. “For the great mischief which this realm suffereth, and long hath done, for that gold and silver are carried out of the realm, so that, in effect, there is none thereof left, which thing, if it should longer be suffered, would shortly be the destruction of the same realm, which God prohibit;” and the statute proceeds to forbid such exportation on pain of forfeiture. The merchants, however, who were necessarily the first to test the effects of this prohibition, found it inconvenient. Some trades, particularly those with the East, could be carried on only by the constant exportation of gold or silver, and in all others it was occasionally useful. They did not venture to attack the theory that the prosperity of a country depends on its accumulation of money. Few of them, probably, doubted its truth. But they maintained that the means by which the legislature endeavoured to promote this excellent result, in fact defeated it. “Allow us,” they said, “to send out silver to Asia, and we will bring back silks and calicos, not for our own consumption, which of course would be a loss, but to sell on the Continent for more silver than they cost, and we shall add annually to the national treasure.” This was assented to, and after more than four centuries of prohibition, the export of bullion was allowed by the 15 Car. II. cap. 17. “Forasmuch,” says the act, “as several considerable