The Wealth of Nations by Part 1 Chapter 10 Page 62

The intention of both regulations is to restrain the competition to a much smaller number than might otherwise be disposed to enter into the trade. The limitation of the number of apprentices restrains it directly. A long term of apprenticeship restrains it more indirectly, but as effectually, by increasing the expense of education.

In Sheffield no master cutler can have more than one apprentice at a time, by a bye law of the corporation. In Norfolk and Norwich no master weaver can have more than two apprentices, under pain of forfeiting five pounds a month to the king. No master hatter can have more than two apprentices anywhere in England, or in the English plantations, under pain of forfeiting five pounds a month, half to the king and half to him who shall sue in any court of record.