Directories appeared in both small and large cities. For example, the 1956 Negro Directory of Sioux Falls (South Dakota), was a guide for the “663 Negroes in the State of South Dakota.” Not surprisingly, the cities with the history of the longest continuously published black business directories included Chicago, which had one of the nation’s largest African American business communities; and, Baltimore which had one of the nation’s longest established communities. From 1939 to 1965, black Chicagoans could get free copies of Scott’s Blue Book: A Classified Business and Service Directory of Greater Chicago’s Colored Citizens’ Commercial, Industrial, Professional, Religious, and Other Activities. In Baltimore, from 1913 to 1946, Robert Coleman published The First Colored Business and Professional Directory of Baltimore, Md., With Washington, D.C. Annex (Thompson 1997). Baltimore and Chicago’s directories stand out for their longevity. In many other cities, the rapid expansion of a city’s black population could stimulate one or two editions, but rarely no more than three, let alone in consecutive order or by the same publisher. For example, prior to the arrival of Scott’s, eight different black business directories were published between 1886 and 1927.