National Park Service curator Kim Robinson holds the photo of Selina Gray, right, who was in charge to care for Arlington House where Gen. Robert E. Lee had lived in for 30 years, Thursday, Oct. 9, 2014, at Arlington National Cemetery in Arlington, Va. The National Park Service has acquired a rare Civil War-era photograph of an enslaved woman at Confederate Gen. Robert E. Lee's home in Virginia. The previously unknown photograph depicts Selina Gray, the head housekeeper to Lee and his family. The photograph was unveiled Thursday at Lee's Arlington House plantation overlooking the nation's capital. (AP Photo/Jose Luis Magana)