The Wealth of Nations by Part 1 Chapter 11 Page 257

ancient and modern times, therefore, is as twelve to six, or as two to one. In those ancient times a tod of wool would have purchased twice the quantity of subsistence which it will purchase at present; and consequently twice the quantity of labour, if the real recompense of labour had been the same in both periods.

This degradation both in the real and nominal value of wool could never have happened in consequence of the natural course of things. It has accordingly been the effect of violence and artifice: first, of the absolute prohibition of exporting wool from England; secondly, of the permission of importing it from Spain duty free; thirdly, of the prohibition of exporting it from Ireland to any other country but England. In consequence of these regulations the market for English wool, instead of being somewhat