The Wealth of Nations by Part 4 Chapter 8 Page 28

therefore, if the exportation of it could be totally prevented, could monopolize to herself almost the whole woollen trade of the world; and thus, having no rivals, could sell at what price she pleased, and in a short time acquire the most incredible degree of wealth by the most advantageous balance of trade. This doctrine, like most other doctrines which are confidently asserted by any considerable number of people, was, and still continues to be, most implicitly believed by a much greater number- by almost all those who are either unacquainted with the woollen trade, or who have not made particular inquiries.

It is, however, so perfectly false that English wool is in any respect necessary for the making of fine cloth that it is altogether unfit for it. Fine cloth is made altogether of Spanish wool. English wool cannot