McClellan's copy is held by the Library of Congress. McClellan retained posession of the document during his life,
at his death in 1886, his estate transferred it to the Library.
Special Order 191 front
McCllean Special Order 191 back
Collected by Joseph Ryan from the Library of Congress
Who wrote the Lost Order?
Sharpsburg Campaign: Photo Album
Lee's Ruse of War: Special Order 191
American Civil War Exhibits