No More Learning

Suppose all nations to produce corn, cattle, and coarse           only,
and that it was by the exportation of such commodities that gold could
be obtained from the countries which produced them, or from those who
held them in subjection; gold would naturally be of greater exchangeable
value in Poland than in England, on account of the greater expense of
sending such a bulky commodity as corn the more distant voyage, and also
the greater expense attending the conveying of gold to Poland.