The Wealth of Nations by Part 1 Chapter 11 Page 251

The market for butcher’s meat is almost everywhere confined to the country which produces it. Ireland, and some part of British America indeed, carry on a considerable trade in salt provisions; but they are, I believe, the only countries in the commercial world which do so, or which export to other countries any considerable part of their butcher’s meat.

The market for wool and raw hides, on the contrary, is in the rude beginnings of improvement very seldom confined to the country which produces them. They can easily be transported to distant countries, wool without any preparation, and raw hides with very little: and as they are the materials of many manufactures, the industry of other countries may occasion a demand for them, though that of the country which produces them might not occasion any.