Title: John C. Babcock papers
Subjects: Correspondence, United States, United States. Army of the Potomac, Military intelligence
People: Winfield Scott Hancock (1824-1886), Theodore Lyman (1833-1897), George Gordon Meade (1815-1872), William A. Pinkerton (1846-1923), Marsena Rudolph Patrick (1811-1888), Henry Augustus Sharpe (1848-1919)