Bacon’s military map of the United States shewing the forts & fortifications. Scale ca. 1:8,000,000. LC Civil War Maps (2nd ed.), 24 Ent. Sta. Hall: Aug. 182 , 1862. ...
Bacon’s steel plate map of America, political, historical & military. Scale 1:5,702,400. LC Civil War Maps (2nd ed.), 36.8 “Federal free states” are outlined in red, “Federal slave states” ...