catholic_dioceses       Roman Catholic dioceses in the United States,
                        Canada, and Mexico
early_colleges          Early colleges in the United States
historydata             Datasets for historians
judges                  Federal judges in the United States of America
naval_promotions        Promotions of U.S. Navy officers, 1798-1849
paulist_missions        Records of missions held by the Paulist
                        Fathers, 1851-1893
sarna                   Population estimates of American Jews
tudors                  Tudor dynasty
us_national_population
                        Population of the United States, 1790-2010
us_state_populations    Populations of US states and territories,
                        1790-2010
