The Wealth of Nations by Part 4 Chapter 6 Page 4

very different from these; and a commercial country has sometimes granted a monopoly of this kind against itself to certain goods of a foreign nation, because it expected that in the whole commerce between them, it would annually sell more than it would buy, and that a balance in gold and silver would be annually returned to it. It is upon this principle that the treaty of commerce between England and Portugal, concluded in 1703 by Mr. Methuen, has been so much commended. The following is a literal translation of that treaty, which consists of three articles only.

Art. I.

His sacred royal majesty of Portugal promises, both in his own name, and that of his successors, to admit, for ever hereafter, into Portugal, the woollen cloths, and the rest of the woollen manufactures of the British,