- The Library of Congress:


- The Congressional Globe:


- The Official Records of the War of the Rebellion (courtesy of Cornell University):


- The Freedmen and Southern Society Project (courtesy of the University of Maryland):


- The House Divided Project (courtesy of Dickinson College):


- Interactive Constitution from the National Constitution Center:


- The American Battlefield Trust:


- The Pennsylvania Newspaper Archive (courtesy of Penn State University):


- Embattled Freedom: White Abolitionists, Black Fighters of Waverly, Pa (courtesy of Jim Remsen):


- Muster - The Blog of the Journal of the Civil War Era:


- Pennsylvania in the Civil War:


- Civil War Memory:


- The Black Scranton Project:


- The National Museum of Civil War Medicine: