The Wealth of Nations by Part 1 Chapter 11 Page 300

the cloths, therefore, should be supposed equal, and that of the present times is most probably much superior, yet, even upon this supposition, the money price of the finest cloth appears to have been considerably reduced since the end of the fifteenth century. But its real price has been much more reduced. Six shillings and eightpence was then, and long afterwards, reckoned the average price of a quarter of wheat. Sixteen shillings, therefore, was the price of two quarters and more than three bushels of wheat. Valuing a quarter of wheat in the present times at eight-and-twenty shillings, the real price of a yard of fine cloth must, in those times, have been equal to at least three pounds six shillings and sixpence of our present money.

The man who bought it must have parted with the command of a quantity of labour and