The Wealth of Nations by Part 4 Chapter 8 Page 58

By the famous treaty of commerce with Portugal, the consumer is prevented by high duties from purchasing of a neighbouring country a commodity which our own climate does not produce, but is obliged to purchase it of a distant country, though it is acknowledged that the commodity of the distant country is of a worse quality than that of the near one.

The home consumer is obliged to submit to this inconveniency in order that the producer may import into the distant country some of his productions upon more advantageous terms than he would otherwise have been allowed to do. The consumer, too, is obliged to pay whatever enhancement in the price if those very productions this forced exportation may occasion in the home market.

But in the system of laws which has been established for the