The Wealth of Nations by Part 1 Chapter 11 Page 250

country can afford, is necessarily limited by that of the other.

The quantity of wool or of raw hides, for example, which any country can afford is necessarily limited by the number of great and small cattle that are kept in it. The state of its improvement, and the nature of its agriculture, again necessarily determine this number.

The same causes which, in the progress of improvement, gradually raise the price of butcher’s meat, should have the same effect, it may be thought, upon the prices of wool and raw hides, and raise them, too, nearly in the same proportion. It probably would be so if, in the rude beginnings of improvement, the market for the latter commodities was confined within as narrow bounds as that for the former. But the extent of their respective markets is commonly extremely different.