10. John G. Palfrey, The Inter-State Slave Trade, Anti-Slavery Tracts, no. 5 (New York: American anti-Slavery Society, n.d.). (8 p.)

Critique of the interstate slave trade with data on shifts in the concentration of African Americans from the censuses of 1830, 1840, and 1850. (The collection has copies of this pamphlet in volumes 52 [no. 20] and 111 [no. 18].)