Douglass, Frederick, 1817(?)-1895, Letter from Frederick Douglass to Charles Sumner, April 8, 1862 in Frederick Douglass: Selected Speeches and Writings. Foner, Philip S., ed.. Chicago, IL: Lawrence Hill Books, 1999, pp. 493-494. [4-8-1862]

Douglass, Frederick, 1817(?)-1895, The United States Cannot Remain Half-Slave and Half-Free in Frederick Douglass: Selected Speeches and Writings. Foner, Philip S., ed.. Chicago, IL: Lawrence Hill Books, 1999, pp. 656-669. [4-16-1883]