[President Abraham Lincoln, Major General John A. McClernand (right), and E. J. Allen (Allan Pinkerton, left), Chief of the Secret Service of the United States, at Secret Service Department, Headquarters Army of the Potomac, near Antietam, Maryland]
Title: [President Abraham Lincoln, Major General John A. McClernand (right), and E. J. Allen (Allan Pinkerton, left), Chief of the Secret Service of the United States, at Secret Service Department, Headquarters Army of the Potomac, near Antietam, Maryland]
Creator:Alexander Gardner|Abraham Lincoln|John Alexander McClernand|Allan Pinkerton
Date Created: October 4, 1862
Physical Dimensions: Image: 22.4 x 18 cm (8 13/16 x 7 1/16 in.)
Mount: 29.2 x 20.7 cm (11 1/2 x 8 1/8 in.)