Not all manors had all three kinds of land: as an average, demesne accounted for roughly a third of the arable area and villein holdings rather more; but some manors had only demesne land, others had only peasant holdings. Similarly, the proportion of unfree and free tenures could vary greatly. This meant that the amount of wage labour to perform agricultural work on the demesne varied as well. The proportion of the cultivated area in demesne tended to be greater in smaller manors. The share of villein land was greater in large manors, providing the lord with a larger potential supply of labour for demesne work. The proportion of free tenements was less variable, but tended to be greater on the smaller manors. 