. "The Frederick Douglass papers/ Ser. 1, Speeches, debates, and interviews. Vol. 4, 1864 - 80" . . "The Frederick Douglass papers. Ser. 1, Speeches, debates, and interviews, Vol. 4, 1864-80" . . "Speeches, debates, and interviews / Vol. 4, 1864-80 / John W. Blassingame and John R. McKivigan ed. ... [et al.]" . . . . . . .