The Wealth of Nations by Part 1 Chapter 10 Page 125

without one; but a man with a wife and family who should attempt to do so would in most parishes be sure of being removed, and if the single man should afterwards marry, he would generally be removed likewise. The scarcity of hands in one parish, therefore, cannot always be relieved by their superabundance in another, as it is constantly in Scotland, and, I believe, in all other countries where there is no difficulty of settlement.

In such countries, though wages may sometimes rise a little in the neighbourhood of a great town, or wherever else there is an extraordinary demand for labour, and sink gradually as the distance from such places increases, till they fall back to the common rate of the country; yet we never meet with those sudden and unaccountable differences in the wages of neighbouring places which we