The statistics of the population of the United States : embracing the tables of race, nationality, sex, selected ages, and occupations : to which are added the statistics of school attendance and illiteracy, of schools, libraries, newspapers and periodicals, churches, pauperism and crime, and of areas, families, and dwellings : compiled from the original returns of the ninth census, (June 1, 1870,) under the direction of the Secretary of the Interior / by Francis A. Walker.