Repositories in Arkansas:
Arkansas History Commission, One Capitol Mall, Little Rock, AR 72201. Phone: (501) 682-6900. Open 8:00 A.M. to 4:30 P.M., Monday through Saturday. http://www.ark-ives.com/
Butler Center for Arkansas Studies, Central Arkansas Library System, 401 President Clinton Avenue, Little Rock, AR 72201. Phone: (501)320-5700. Open Monday through Saturday: 9 am - 6 pm. http://www.butlercenter.org/
Old State House Museum Collections, 300 West Markham Street, Little Rock, AR 72201, Phone: (501) 324-9685: http://www.collections.oldstatehouse.com/emuseum40/objects/viewcollections?t:state:flow=66e0afee-d0c2-49db-beb8-de71a076505b&t:state:flow1=7bfccf9b-d065-4624-8c10-bbc94b6e32f0
Pea Ridge National Military Park http://www.nps.gov/peri/historyculture/index.htm
Special Collections, University of Arkansas Libraries, 365 N. McIlroy Avenue Fayetteville, AR 72701-4002. Phone: (479) 575-5577; e-mail specoll@uark.edu.
http://libinfo.uark.edu/specialcollections/
University of Arkansas at Little Rock Archives and Special Collections http://ualr.edu/cahc/
Repositories of National Organizations:
Library of Congress; Collections related to the Civil War: http://www.loc.gov/topics/content.php?subcat=8
National Archives and Records Administration: http://www.archives.gov/
National Union Manuscript Catalog: http://www.loc.gov/coll/nucmc/
Repositories Located in Other States:
Abraham Lincoln Presidential Library: http://www.alplm.org/Home.aspx
Baylor University, Waco, TX; Texas Collection: http://www.baylor.edu/lib/texas/
Belleville Public Library, Belleville, IL: http://www.bellevillepubliclibrary.org/archives-and-genealogy
Bowling Green State University, Bowling Green, OH; Center for Archival Collections: http://www.bgsu.edu/colleges/library/cac/bib/page39489.html
Chicago Historical Society: http://www.chicagohs.org/research
Columbia University, New York: http://archivesportal.cul.columbia.edu/
Dartmouth College Library, Hanover, NH; Rauner Special Collections: http://www.dartmouth.edu/~library/rauner/
Denver Public Library, Denver, CO; Western History and Genealogy: http://history.denverlibrary.org/
Duke University, Durham, NC; Rare Books, Manuscripts, and Special Collections Library: http://library.duke.edu/specialcollections/
Emory University; Atlanta, GA; Robert W. Woodruff Library, Manuscript, Archives & Rare Book Library, Southern Historical Collections: http://marbl.library.emory.edu/collection-overview/southern-historical-collections
The Filson Historical Society, Louisville, KY: http://filsonhistorical.org/collections-resources/
Hill College, Hillsboro, TX; Texas Heritage Museum, Historical Research Center: http://www.hillcollege.edu/museum/
Huntington Library, San Marino, CA: http://www.huntington.org/research/
Illinois State Historical Library, Springfield: http://www.state.il.us/hpa/lib/
Illinois State University, Normal, Milner Library: http://library.illinoisstate.edu/unique-collections/
Indiana Historical Society: http://www.indianahistory.org/library/
Indiana State Library Manuscripts Section: http://www.in.gov/library/manuscripts.htm
Indiana University, Bloomington, Lilly Library: http://www.indiana.edu/~liblilly/collections.shtml
Iowa State University Library, Ames; Special Collections Department: http://www.add.lib.iastate.edu/spcl/
Jackson County Historical Society, Independence, MO; Archives & Research Library: http://jchs.org/research/
Kansas State Historical Society, Topeka: http://www.kshs.org/portal_research
Kentucky Historical Society, Frankfort: http://history.ky.gov/
Lake Forest College, Lake Forest, IL, Donnelley and Lee Library: http://www.lakeforest.edu/library/archives/
McLean County Historical Society, Bloomington, IL: http://www.mchistory.org/mcmh_research_archive.html
Miami University, Oxford, OH; Walter Havighurst Special Collections: http://spec.lib.miamioh.edu
Minnesota Historical Society, St. Paul: http://www.mnhs.org/collections/index.htm
Missouri Historical Society, St. Louis: http://www.mohistory.org/lrc/collections
Montana State University, Bozeman; Merrill G. Burlingame Special Collections: http://www.lib.montana.edu/archives/
Navarro College Library, Hanover, NH; Pearce Civil War Collection: http://www.pearcemuseum.com/collections/
Nebraska State Historical Society, Lincoln, Library/Archives Division: http://www.nebraskahistory.org/lib-arch/index.shtml
New York Historical Society, New York: https://www.nyhistory.org/web/
Ohio Historical Society: http://www.ohiohistory.org/collections--archives/archives-library
Pierpoint Morgan Library, New York; Miscellaneous American Manuscripts Unassigned: http://www.themorgan.org/collections/defaultSplash.asp
Stanford University, Palo Alto, CA; Special Collections & University Archives: http://library.stanford.edu/spc
State Historical Society of Iowa, Des Moines: http://www.iowahistory.org/libraries/index.html
State Historical Society of Iowa, Iowa City: http://www.iowahistory.org/libraries/index.html
Tennessee State Library & Archives, Nashville: http://www.tn.gov/tsla/Collections.htm
Texas State Library & Archives Collection, Austin: https://www.tsl.texas.gov/
Tulane University, New Orleans, Howard-Tilton Memorial Library; Louisiana Historical Association Collection: http://library.tulane.edu/resources
U.S. Army Military History Institute, Carlisle Barracks, PA: http://www.carlisle.army.mil/ahec/collections.cfm
University of Georgia, Athens, Hargett Rare Book and Manuscript Library: http://www.libs.uga.edu/hargrett/index.shtml
University of Illinois at Urbana-Champaign: http://www.library.illinois.edu/
University of Iowa Libraries, Iowa City; Special Collections & University Archives: http://www.lib.uiowa.edu/spec-coll/
University of Michigan, Ann Arbor, Bentley Historical Library: http://bentley.umich.edu/research/guides/civilwar/
University of Michigan, Ann Arbor, William L. Clements Library: http://clements.umich.edu/
University of Missouri, Columbia; Western Historical Manuscripts Collection: http://whmc.umsystem.edu/
University of Missouri, St. Louis; Western Historical Manuscripts Collection: http://www.umsl.edu/~whmc/
University of Missouri, Rolla; Western Historical Manuscripts Collection: http://web.mst.edu/~whmcinfo/
University of North Carolina, Chapel Hill, Wilson Library; Southern Historical Collection: http://www.lib.unc.edu/mss/shc/
University of Notre Dame, South Bend, IN; Rare Books & Special Collections, Manuscripts of the American Civil War: http://www.rarebooks.nd.edu/digital/civil_war/index.shtml
University of Oklahoma, Norman: http://libraries.ou.edu/
University of Texas at Arlington; Thomas S. Sutherland, Jr. Collection: http://www.uta.edu/library/
University of Texas at Austin; Eugene C. Barker Texas History Collection: http://www.cah.utexas.edu/collections/texas_history.php
University of Wisconsin at Whitewater, Anderson Library: https://library.uww.edu/
Vigo County Public Library, Terre Haute, IN; Community Archives: http://www.vigo.lib.in.us/archives/inventories/wars/index.php
Walter Havighurst Special Collections, Miami University, Oxford, OH: http://spec.lib.muohio.edu/index.php
Western Reserve Historical Society, Cleveland, OH: http://www.wrhs.org/
Wilson's Creek National Battlefield, Republic, MO; Civil War Museum: http://www.nps.gov/wicr/historyculture/index.htm
Wisconsin Historical Society, Madison: http://www.wisconsinhistory.org/libraryarchives/
Yale University Library Special Collections: http://www.library.yale.edu/special_collections/