This chapter examines the history of census categories, and presents the end-point of the process at which new occupations receive official recognition and legitimation. It discusses how occupations form and come to be recognized as such. Occupations may be thought of as units in folk taxonomies of work. Like any other classificatory scheme, they offer a way of organizing some area of the social world and rendering it familiar, predictable and manageable. The chapter discusses creation of health visiting between 1850 and 1919. Health visiting should properly be analyzed not as a phenomenon sui generis as one among a number of experiments including urban missionary and temperance movements and the voluntary philanthropy usually identified with the Charity Organisation Society and regarded as the ancestor of modern social work. Health Societies on the lines of Manchester and Salford Ladies Health Society should be formed all over the country.