| Credit: | by Gardner (Alexander) |
|---|---|
| Date: | 1862.10.04 |
| Negative Size: | 8 in. x 10 in. |
| Equipment: | horse, saddle; wall tent |
| Locations & Lines: | Antietam MD; Maryland |
| Military Units: | Army of the Potomac; Bureau of Military Information (Secret Service); US Army |
| Persons: | Pinkerton (Allan J.) |
| Sources: | Library of Congress; National Portrait Gallery; Princeton University Library |
| Structures & Establishments: | Secret Service headquarters (Antietam battlefield MD) |
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