↑Merritt Roe Smith, 'George Washington and the Establishment of the Harpers Ferry Armory', The Virginia Magazine of History and Biography, Vol. 81, No. 4 (October, 1973), p. 415, n. 2
↑For example, Horace Greeley, The American Conflict: A History of the Great Rebellion in the United States of America, 1860-64. Volume: 1. (1866), p. 279; French Ensor Chadwick, Causes of the Civil War, 1859-1861 (1906) p. 74; James M. McPherson, Battle Cry of Freedom: The Civil War Era (1988), p. 201; Stephen W. Sears, Landscape Turned Red: The Battle of Antietam (2003) p. 116.