Brown, Jeffrey Paul. Timothy Pickering and the Northwest Territory. Northwest Ohio Quarterly 53 (Fall 1981): 117-32.
Clarfield, Gerard H. Postscript to the Jay Treaty: Timothy Pickering and Anglo-American Relations, 1795-1797. William and Mary Quarterly, 3d. ser. 23 (January 1966): 106-20.
___. Timothy Pickering and American Diplomacy, 1795-1800. Columbia: University of Missouri Press, 1969.
___. Timothy Pickering and the American Republic. Pittsburgh: University of Pittsburgh Press, 1980.
___. Timothy Pickering and French Diplomacy, 1795-1796. Essex Institute Historical Collections 104 (January 1968): 58-74.
___. Victory in the West: A Study of the Role of Timothy Pickering in the Successful Consummation of Pinckneys Treaty. Essex Institute Historical Collections 101 (October 1965): 333-53.
Guidorizzi, Richard Peter. Timothy Pickering: Opposition Politics in the Early Years of the Republic. Ph.D. dissertation, St. Johns University, 1968.
Hickey, Donald R. Timothy Pickering and the Haitian Slave Revolt: A Letter to Thomas Jefferson in 1806. Essex Institute Historical Collections 120 (July 1984): 149-63.
McLean, David. Timothy Pickering and the Age of the American Revolution. New York: Arno Press, 1982.
Phillips, Edward Hake. The Public Career of Timothy Pickering, Federalist, 1745-1802. Ph.D. dissertation, Harvard University, 1950.
___. Salem, Timothy Pickering, and the American Revolution. Essex Institute Historical Collections 111 (January 1975): 65-78.
___. Timothy Pickering at His Best: Indian Commissioner, 1790-1794. Essex Institute Historical Collections 102 (July 1966): 163-202.
Pickering, Octavius, and Charles W. Upham. The Life of Timothy Pickering. 4 vols. Boston: Little, Brown, & Co., 1867-1873.
Pickering, Timothy. Political Essays. A Series of Letters Addressed to the People of the United States. Canandaigua, NY: J.D. Bemis, 1812.
Prentiss, Hervey Pittman. Pickering and the Embargo. Essex Institute Historical Collections 69 (April 1933): 97-136.
___. Timothy Pickering and the Federalist Party, 1801-1804.Essex Institute Historical Collections 69 (January 1933): 1-35.
___. Timothy Pickering as the Leader of New England Federalism, 1800-1815. 1934. Reprint. New York: Da Capo Press, 1972.
___. Timothy Pickering and the War of 1812. Essex Institute Historical Collections 70 (April 1934): 105-46.
Wilbur, William Allan. Crisis in Leadership: Alexander Hamilton, Timothy Pickering and the Politics of Federalism, 1795-1804. Ph.D. dissertation, Syracuse University, 1969.
___. Timothy Pickering, Federalist Politician: An Historiographical Perspective. Historian 34 (February 1972): 278-92.