But what proof does he give of this?--no other than the assertion that "the most desert moors in Norway and Scotland produce some sort of pasture for cattle, of which the milk and the increase are always more than sufficient, not only to maintain all the labour necessary for tending them, and to pay the ordinary profit to the farmer, or owner of the herd or flock, but to afford some small rent to the landlord." Now of this I may be permitted to entertain a doubt. I believe that as yet in every country, from the rudest to the most refined, there is land of such a quality that it cannot yield a produce more than sufficiently valuable to replace the stock employed upon it, together with the profits ordinary and usual in that country. In America we all know that this is the case, and yet no one maintains that the principles which regulate rent are different in that country and in Europe. But if it were true that England had so far advanced in cultivation, that at this time there were no lands remaining which did not afford a rent, it would be equally true that there formerly must have been such lands; and that whether there be or not is of no importance to this question, for it is the same thing if there be any capital employed in Great Britain on land which yields only the return of stock with its ordinary profits, whether it be employed on old or on new land. If a farmer agrees for land on a lease of seven or fourteen years, he may propose to employ on it a capital of 10,000_l._, knowing that at the existing price of grain and raw produce, he can replace that part of his stock which he is obliged to expend, pay his rent, and obtain the general rate of profit. He will not employ 11,000_l._, unless the last 1,000_l._ can be employed so productively as to afford him the usual profits of stock. In his calculation, whether he shall employ it or not, he considers only whether the price of raw produce is sufficient to replace his expenses and profits, for he knows that he shall have no additional rent to pay. Even at the expiration of his lease his rent will not be raised; for if his landlord should require rent, because this additional 1000_l._ was employed, he would withdraw it; since by employing it he gets, by the supposition, only the ordinary and usual profits which he may obtain by any other employment of stock; and therefore he cannot afford to pay rent for it, unless the price of raw produce should further rise, or, which is the same thing, unless the usual and general rate of profits should fall. If the comprehensive mind of Adam Smith had been directed to this fact, he would not have maintained that rent forms one of the component parts of the price of raw produce; for price is everywhere regulated by the return obtained by this last portion of capital, for which no rent whatever is paid. If he had adverted to this principle, he would have made no distinction between the law which regulates the rent of mines and the rent of land.