of almost any other goods. As they are the universal instruments of commerce, they are more readily received in return for all commodities than any other goods; and on account of their small bulk and great value, it costs less to transport them backward and forward from one place to another than almost any other sort of merchandise, and they lose less of their value by being so transported.

Of all the commodities, therefore, which are bought in one foreign country, for no other purpose but to be sold or exchanged again for some other goods in another, there are none so convenient as gold and silver. In facilitating all the different round-about foreign trades of consumption which are carried on in Great Britain consists the principal advantage of the Portugal trade; and though it is not a capital advantage, it is no doubt a considerable one.