Association of Officers of the Twentieth Massachusetts Regiment. "Reports, Letters and Papers Appertaining to Twentieth Massachusetts Volunteer Infantry." 2 vols. Bound manuscripts. Boston Public Library, Boston, Massachusetts.
Bruce, George A. The Twentieth Regiment of Massachusetts Volunteer Infantry 1861 - 1865. Cambridge, Massachusetts: The Riverside Press, 1906.
Green, James L. "Civil War Ballooning During the Seven Days Campaign," Civil War Trust (http://www.civilwar.org/education/history/civil-war-ballooning/ballooning-during-the-seven.html).
Civil War and Later Pension Files. Department of Veterans Affairs, Record Group 15. National Archives, Washington, D.C.
Howe, Mark De Wolfe, editor. Touched With Fire: Civil War Letters and Diary of Oliver Wendell Holmes, Jr. New York, New York: Fordham University Press, 2000.
Massachusetts. Pittsfield. Berkshire County Eagle.
Military, Compiled Service Records. Civil War. Carded Records, Volunteer Organizations. Records of the Adjutant General's Office, 1780s-1917, Record Group 94. National Archives, Washington, D.C.
Miller, Richard F. Harvard's Civil War: A History of the Twentieth Massachusetts Volunteer Infantry. Lebanon, New Hampshire: University Press of New England, 2005.
O'Reilly, Francis Augustin. The Fredericksburg Campaign: Winter War on the Rappahannock. Baton Rouge, Louisiana: Louisiana State University Press, 2003.
Palfrey, Francis Winthrop. Memoir of William Francis Bartlett. Boston, Massachusetts: Houghton, Osgood and Company, 1878.
Root, Edwin R. and Jeffrey D. Stocker. Isn't This Glorious! The 15th, 19th, and 20th Massachusetts Volunteer Infantry Regiments at Gettysburg's Copse of Trees. Bethlehem, Pennsylvania: Moon Trail Books, 2006.
Scott, Robert Garth, editor. Fallen Leaves: The Civil War Letters of Major Henry Livermore Abbott. Kent, Ohio: The Kent State University Press, 1991.