The Wealth of Nations by Part 4 Chapter 1 Page 6

have wherewithal to carry on foreign wars.

In consequence of these popular notions, all the different nations of Europe have studied, though to little purpose, every possible means of accumulating gold and silver in their respective countries. Spain and Portugal, the proprietors of the principal mines which supply Europe with those metals, have either prohibited their exportation under the severest penalties, or subjected it to a considerable duty.

The like prohibition seems anciently to have made a part of the policy of most other European nations. It is even to be found, where we should least of all expect to find it, in some old Scotch acts of Parliament, which forbid under heavy penalties the carrying gold or silver forth of the kingdom. The like policy anciently took place both in France and England.