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Timothy O'Sullivan

Guard Mount, Head-Quarters Army of the Potomac

February 1864
Albumen print, pl. 55 from the album "Gardner's Photographic Sketch Book of the War, Volume II" (1866)
17.7 × 22.9 cm (7 × 9 in)

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In the collection of Art Institute of Chicago, Chicago · as of July 2026

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