(3) Wallon, H. Historie de l'esclavage dans l'antiquité. 2d ed., 3 vols. Paris, 1879.
(4) Sugenheim, S. Geschichte der Aufhebung der Leibeigenschaft und Hörigkeit in Europa bis um die Mitte des neunzehnten Jahrhunderts. St. Petersburg, 1861.
(5) Edwards, Bryan. The History, Civil and Commercial, of the British Colonies in the West Indies. 3 vols. London, 1793-1801.
(6) Helps, Arthur. Life of Las Casas, "the Apostle of the Indies." 5th ed. London, 1890.
(7) Phillips, Ulrich B. American Negro Slavery. A survey of the supply, employment, and control of Negro labor as determined by the plantation régime. New York, 1918.
(8) ——. Plantation and Frontier, 1649-1863. Documentary history of American industrial society. Vols. I-II. Cleveland, 1910-11.
(9) A Professional Planter. Practical rules for the management and medical treatment of Negro slaves in the Sugar Colonies. London, 1803. [Excerpt in Phillips, U. B., Plantation and Frontier, I, 129-30.]
(10) Russell, J. H. "Free Negro in Virginia, 1619-1865," Johns Hopkins University Studies in Historical and Political Science. Baltimore, 1913.
(11) Olmsted, F. L. A Journey in the Seaboard Slave States. With remarks on their economy. New York, 1856.
(12) Smedes, Susan D. Memorials of a Southern Planter. Baltimore, 1887.