The first creations of towns are linked to a system of specialism at individual settlements, which is evidenced in studying place-names. Sutterton, "shoe-makers' tun" (in the area of the Danelaw such places are Sutterby) was so named because local circumstances allowed the growth of a craft recognised by the people of surrounding places. Similarly with Sapperton, the "soap-makers' tun". While Boultham, the "meadow with burdock plants", may well have developed a specialism in the production of burrs for wool-carding, since meadows with burdock merely growing in them must have been relatively numerous. From places named for their services or location within a single district, a category of which the most obvious perhaps are the Eastons and Westons, it is possible to move outwards to glimpse component settlements within larger economic units. Names betray some role within a system of seasonal pasture, Winderton in Warwickshire is the winter tun and various Somertons are self-explanatory. Hardwicks are dairy farms and Swinhopes the valleys where pigs were pastured.