McDonough County and Surrounding Areas:
McDonough County Historical Society
McDonough County History Consortium
Schuyler (IL) County Museum & Genealogical Center
Warren (IL) County Historical Society
Hancock (IL) County Historical Society
Fulton (IL) County Historical and Genealogical Society
Henderson (IL) County Genealogy and Family History Society
Western Illinois University Library Archives
Warsaw (IL) Public Library Digital Archives
Illinois State:
Illinois Regional Archives Depository (IRAD) System
Illinois State Genealogical Society
Abraham Lincoln Presidential Library
Illinois State Historical Society
Illinois Digital Newspaper Collection
National & International:
National Archives and Records Administration
Daughters of the American Revolution
Allen County Library Genealogy Center
Civil War Soldiers and Sailors Database
Historical Atlases and Maps of the United States