The Wealth of Nations by Part 4 Chapter 5 Page 94

something else, to give in exchange for corn.

But in every country the home market, as it is the nearest and most convenient, so is it likewise the greatest and most important market for corn. That rise in the real value of silver, therefore, which is the effect of lowering the average money price of corn, tends to enlarge the greatest and most important market for corn, and thereby to encourage, instead of discouraging, its growth.

By the 22nd of Charles II, c. 13, the importation of wheat, whenever the price in the home market did not exceed fifty-three shillings and fourpence the quarter, was subjected to a duty of sixteen shillings the quarter, and to a duty of eight shillings whenever the price did not exceed four pounds. The former of these two prices has, for more than a century