The effect of the relinquishment of the old demesne farms by the lords of the manors was still more influential in destroying serfdom. The lords had valued serfdom above all because it furnished an adequate and absolutely certain supply of labor. The villains had to stay on the manor and provide the labor necessary for the cultivation of the demesne. But if the demesne was rented out to a farmer or divided among several holders, the interest of the lord in the labor supply on the manor was very much diminished. Even if he agreed in his lease of the demesne to the new farmer that the villains should perform their customary services in as far as these had not been commuted, yet the farmer could not enforce this of himself, and the lord of the manor was probably languid or careless or dilatory in doing so. The other payments and burdens of serfdom were not so lucrative, and as the ranks of the old villain class were depleted by the extinction of families, and fewer inhabitants were bound to attend the manor courts, they became less so. It became, therefore, gradually more common, then quite universal, for the lords of manors to cease to enforce the requirements of serfdom. A legal relation of which neither party is reminded is apt to become obsolete; and that is what practically happened to serfdom in England. It is true that many persons were still legally serfs, and occasionally the fact of their serfdom was asserted in the courts or inferred by granting them manumission. These occasional enfranchisements continued down into the second half of the sixteenth century, and the claim that a certain man was a villain was pleaded in the courts as late as 1618. But long before this time serfdom had ceased to have much practical importance. It may be said that by the middle of the fifteenth century the mass of the English rural population were free men and no longer serfs. With their labor services commuted to money and the other conditions of their villainage no longer enforced, they became an indistinguishable part either of the yeomanry or of the body of agricultural laborers. [Illustration: Town Houses in the Fifteenth Century. (Wright, T.: _History of Domestic Manners and Sentiments_.)]