The Wealth of Nations by Part 1 Chapter 10 Page 68

In Scotland there is no general law which regulates universally the duration of apprenticeships. The term is different in different corporations. Where it is long, a part of it may generally be redeemed by paying a small fine. In most towns, too, a very small fine is sufficient to purchase the freedom of any corporation. The weavers of linen and hempen cloth, the principal manufactures of the country, as well as all other artificers subservient to them, wheel-makers, reel-makers, etc., may exercise their trades in any town corporate without paying any fine.

In all towns corporate all persons are free to sell butcher’s meat upon any lawful day of the week. Three years in Scotland is a common term of apprenticeship, even in some very nice trades; and in general I know of no country in Europe in which corporation laws are so little oppressive.