Even after the lapse of many years, Henry Adams's account of the purchase of Louisiana remains the best: Volumes I and II of his "History of the United States." J. A. Robertson in his "Louisiana under the Rule of Spain, France, and the United States," 1785-1807, 2 vols. (1911), has brought together a mass of documents relating to the province and territory. Barbe-Marbois, "Histoire de la Louisiana et de la Cession" (1829), which is now accessible in translation, is the main source of information for the French side of the negotiations. Frederick J. Turner, in a series of articles contributed to the "American Historical Review" (vols. II, III, VII, VIII, X), has pointed out the significance of the diplomatic contest for the Mississippi Valley. Louis Pelzer has written on the "Economic Factors in the Acquisition of Louisiana" in the "Proceedings" of the Mississippi Valley Historical Association, vol. VI (1913). There is no adequate biography of either Monroe or Livingston. T. L. Stoddard has written on "The French Revolution in San Domingo" (1914).