Joseph Williams, Archives and Special Collections, Dickinson College
Sized, cropped, and adjusted for use here by John Osborne, Dickinson College, July 19, 2013.
Edwin Forbes, Life Studies of the Great Army, A Historical Work of Art in Copper-Plate Etching ...(New York: Edwin Forbes, 1876), plate 6.
Cropped from the larger image, also available here.
Privately published. The complete set of forty plates sold for $50.00 in 1876.