Harper, W. (1838). Memoir on slavery: Read before the Society for the Advancement of Learning, of South Carolina, at its annual meeting at Columbia, 1837. Charleston: J.S. Burges.

Harper, William. Memoir On Slavery: Read Before the Society for the Advancement of Learning, of South Carolina, At Its Annual Meeting At Columbia, 1837. Charleston: J.S. Burges, 1838.

Harper, William. Memoir On Slavery: Read Before the Society for the Advancement of Learning, of South Carolina, At Its Annual Meeting At Columbia, 1837. Charleston: J.S. Burges, 1838.