Henry L. Abbot. Biographical Memoir of John Gross Barnard, 1815–1882. Washington, D.C.: National Academy of Sciences, 1902.

Henry L. Abbot. “Gouverneur Kemble Warren,” Professional Memoirs, Corps of Engineers, United States Army and Engineer Department at Large, vol. 5. Washington Barracks, D.C.: Press of the Engineer School, 1913.

Jean Baker. Untitled Civil War Manuscript. Office of History, n.d.

J. G. Barnard and W. F. Barry. Report of the Engineer and Artillery Operations of the Army of the Potomac. New York: D. Van Nostrand, 1863.

Freeman Cleaves. Meade of Gettysburg. Norman: Univ. of Oklahoma, 1991.

George W. Cullum. Biographical Register of the Officers and Graduates of the U.S. Military Academy at West Point. vol. 1. Boston: Riverside Press, 1891.

A. A. Fries. “General George Brinton McClellan,” Professional Memoirs, Corps of Engineers, United States Army, vol. 5. Washington Barracks, D.C.: Press of the Engineer School, 1913.

A. A. Fries. “Gen. George Gordon Meade,” Professional Memoirs, Corps of Engineers, United States Army and Engineer Department at Large, vol. 5. Washington Barracks, D.C.: Press of the Engineer School.

David M. Jordan. “Happiness is not my Companion:” The Life of General G. K. Warren. Bloomington: Indiana Univ., 2001.

George Meade, ed. The Life and Letters of George Gordon Meade, Major-General United States Army, 2 vols. New York: Charles Scribner’s Sons, 1913.

Harry W. Pfanz.  Gettysburg: The Second Day.  Univ. of North Carolina, 1998.

Ethan S. Rafuse. George Gordon Meade and the War in the East. Abilene, Tex.: McWhiney Foundation Press, 2003.

Ethan S. Rafuse. McClellan’s War: The Failure of Moderation in the Struggle for the Union. Bloomington: Indiana Univ., 2005.

Martin Reuss. “Andrew Atkinson Humphreys.” American National Biography, vol. 11. New York: Oxford Univ., 1999.

Richard A. Sauers. Meade: Victor of Gettysburg. Washington, D.C.: Brassey’s Inc., 2003.

Frank N. Schubert, ed. Explorer of the Northern Plains: Lieutenant Gouverneur K. Warren’s Preliminary Report of Explorations in Nebraska and Dakota, in the Years 1855 -’56 – ‘57. Engineer Historical Studies Number 2. Washington: Historical Division , Office of Administrative Services, Office of the Chief of Engineers, 1981.

Stephen W. Sears. George B. McClellan: The Young Napoleon. New York: Ticknor and Fields, 1988.

Emerson Gifford Taylor. Gouverneur Kemble Warren: Life and Letters of an American Soldier, 1830-1882. New York: Houghton Mifflin, 1932.