The Wealth of Nations by Part 4 Chapter 9 Page 29

would naturally turn itself to foreign trade, and be employed in exporting to foreign countries such parts of the rude and manufactured produce of its own country as exceeded the demand of the home market. In the exportation of the produce of their own country, the merchants of a landed nation would have an advantage of the same kind over those of mercantile nations which its artificers and manufacturers had over the artificers and manufacturers of such nations; the advantage of finding at home that cargo and those stores and provisions which the others were obliged to seek for at a distance.

With inferior art and skill in navigation, therefore, they would be able to sell that cargo as cheap in foreign markets as the merchants of such mercantile nations; and with equal art and skill they would be able to sell it cheaper.