[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]
Alexander Gardner|Allan Pinkerton|Abraham Lincoln|John Alexander McClernand
October 3, 1862 · Albumen silver print from glass negative · Photographs
![[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] — Alexander Gardner|Allan Pinkerton|Abraham Lincoln|John Alexander McClernand](https://d2pvxr3eb77vb4.cloudfront.net/assets/v1/92/9229164ee3018ee5332d8b4114a1b679af459b35d14434c314c1d6f5f2dab3c6/full.webp)
- Artist
- Alexander Gardner|Allan Pinkerton|Abraham Lincoln|John Alexander McClernand
- Date
- October 3, 1862
- Medium
- Albumen silver print from glass negative
- Department
- Photographs
- Credit line
- Gilman Collection, Gift of The Howard Gilman Foundation, 2005
![[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]](https://d2pvxr3eb77vb4.cloudfront.net/assets/v1/87/8774d696632deb8dbe45fa801a430fb1420e8fa68c37648b0e010b18a03ef254/graph.webp)
![[Camp Scene with Soldiers of the 22nd New York State Militia, Harper's Ferry, Virginia]](https://d2pvxr3eb77vb4.cloudfront.net/assets/v1/c1/c1e5daee7a4a1513548cd19b4f813044e2db786b0e420b2574bebf0a21e6e322/graph.webp)
![[Ellis-Eum, Tent of Captain John L. Ellis, Company F, 71st New York State Militia, Washington, D.C.]](https://d2pvxr3eb77vb4.cloudfront.net/assets/v1/98/988e5181a0f99ac5401cd2b4b86f80baea09b7891a4d2fb11f2baf6b299b9ca0/graph.webp)
![[Sanford Robinson Gifford]](https://d2pvxr3eb77vb4.cloudfront.net/assets/v1/77/77e95542c209e90caf3966df9ae0322b83b0d127e628b20b1f2f7decfdd41c2f/graph.webp)
![[Soldiers and Officers, Likely Members of the 71st New York State Militia]](https://d2pvxr3eb77vb4.cloudfront.net/assets/v1/36/36be01b229b9ef922c15e6c2a77406d5922c02e886d3cb53fc39a6020592d356/graph.webp)