Unidentified Union Army officer. Hand-tinted half-plate ambrotype, ca. Civil War era. Palace of the Governors Photo Archives (NMHM/DCA), Neg. No. HP.2011.35.1.

Unidentified Union Army officer. Hand-tinted half-plate ambrotype, ca. Civil War era. Palace of the Governors Photo Archives (NMHM/DCA), Neg. No. HP.2011.35.1.

Unidentified Union Army officer. Hand-tinted half-plate ambrotype, ca. Civil War era. Palace of the Governors Photo Archives (NMHM/DCA), Neg. No. HP.2011.35.1.