She was the author of several major works including, Politics, Principle, and Prejudice 1865-1866: Dilemma of Reconstruction America (1963) which she wrote with her husband, John H. Cox; both shared the 1964 Dunning Prize for this work. She also wrote on her own: Reconstruction: The Negro, and the New South (1973), and also Lincoln and Black Freedom: A Study of Presidential Leadership (1981).
