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An exceptional view of Col. Duryea's staff posed around a telescope on the porch of an officers' building inside Fort Monroe, Virginia. The colonel of the 5th New York Vols stands tall, looking confidently into the distance, surrounded by chaplain Gordon Winslow (seated at table), & soon to be General Gouverneur K. Warren in zouave's dress peering through a field telescope.
No backmark, wear as shown in the photograph, identified in period brown ink on the verso.

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G. K. Warren:
At the start of the war, Warren was a first lieutenant and mathematics instructor at the United States Military Academy at West Point. He helped raise a local regiment for service in the Union Army and was appointed lieutenant colonel of the 5th New York Infantry on May 14, 1861. Warren and his regiment saw their first combat at the Battle of Big Bethel in Virginia on June 10, arguably the first major land engagement of the war. He was promoted to colonel and regimental commander on September 10.