The Wealth of Nations by Part 3 Chapter 3 Page 8

burghers, as individuals, I know not. I reckon it not improbable that they were, though I cannot produce any direct evidence of it. But however this may have been, the principal attributes of villanage and slavery being thus taken away from them, they now, at least, became really free in our present sense of the word Freedom.

Nor was this all. They were generally at the same time erected into a commonalty or corporation, with the privilege of having magistrates and a town council of their own, of making bye-laws for their own government, of building walls for their own defence, and of reducing all their inhabitants under a sort of military discipline by obliging them to watch and ward, that is, as anciently understood, to guard and defend those walls against all attacks and surprises by night as well as by day.