The Wealth of Nations by Part 4 Chapter 7 Page 107

All such countries have evidently gained a more extensive market for their surplus produce, and must consequently have been encouraged to increase its quantity.

But that those great events should likewise have contributed to encourage the industry of countries, such as Hungary and Poland, which may never, perhaps, have sent a single commodity of their own produce to America, is not, perhaps, altogether so evident. That those events have done so, however, cannot be doubted. Some part of the produce of America is consumed in Hungary and Poland, and there is some demand there for the sugar, chocolate, and tobacco of that new quarter of the world. But those commodities must be purchased with something which is either the produce of the industry of Hungary and Poland, or with something which had been purchased with some part of that produce.