The Wealth of Nations by Part 4 Chapter 7 Page 84

it was easy to foresee, would receive them if they came to it loaded with the heavy duties to which almost all foreign goods are subjected on their importation into Great Britain. Unless, therefore, some part of those duties was drawn back upon exportation, there was an end of the carrying trade; a trade so much favoured by the mercantile system.

Our colonies, however, are by no means independent foreign countries; and Great Britain having assumed to herself the exclusive right of supplying them with all goods from Europe, might have forced them (in the same manner as other countries have done their colonies) to receive such goods, loaded with all the same duties which they paid in the mother country. But, on the contrary, till 1763, the same drawbacks were paid upon the exportation of the greater part of foreign