Again:

"The greater the number and revenue of the inhabitants of the town,
the more extensive is the market which it affords to those of the
country; and the more extensive that market, it is always the more
advantageous to a great number. The corn which grows within a mile of
the town, sells there for the same price with that which comes from
twenty miles distance. But the price of the latter must, generally,
not only pay the expense of raising it and bringing it to market, but
afford, too, the ordinary profits, of agriculture to the farmer. The
proprietors and cultivators of the country, therefore, which lies in
the neighbourhood of the town, over and above the ordinary profits of
agriculture, gain, in the price of what they sell, the whole value of
the carriage of the like produce that is brought from more distant
parts; and they save, besides, the whole value of this carriage in
the price of what they buy. Compare the cultivation of the lands in
the neighbourhood of any considerable town, with that of those which
lie at some distance from it, and you will easily satisfy yourself
how much the country is benefited by the commerce of the town."

These views are in perfect accordance with the facts. The labourer
rejoices when the market for his labour is brought to his door by the
erection of a mill or a furnace, or the construction of a road. The
farmer rejoices in the opening of a market for labour at his door
giving him a market for his food. His land rejoices in the home
consumption of the products it has yielded, for its owner is thereby
enabled to return to it the refuse of its product in the form of
manure. The planter rejoices in the erection of a mill in his
neighbourhood, giving him a market for his cotton and his food. The