Brown, D. P. (1860). Letter of David Paul Brown, Esq., to the incorporated "Pennsylvania Society for Promoting the Abolition of Slavery, for the Relief of Free Negroes unlawfully held in bondage, and for Improving the Condition of the African Race.". [Philadelphia?: s.n..

Brown, David Paul. Letter of David Paul Brown, Esq., to the Incorporated "Pennsylvania Society for Promoting the Abolition of Slavery, for the Relief of Free Negroes Unlawfully Held in Bondage, and for Improving the Condition of the African Race.". [Philadelphia?: s.n., 1860.

Brown, David Paul. Letter of David Paul Brown, Esq., to the Incorporated "Pennsylvania Society for Promoting the Abolition of Slavery, for the Relief of Free Negroes Unlawfully Held in Bondage, and for Improving the Condition of the African Race.". [Philadelphia?: s.n., 1860.