Here and Then by George Ella Lyon
They called her the Angel of Camp Robinson--a 40-year-old nurse named Eliza Hoskins. Across an abyss of 133 years since the Civil War, she calls for medical supplies. Twelve-year-old Abby hears her ghostly voice and struggles to ease the suffering of men long dead. But why now? And why her?
New York: Orchard Books, 1994 - 114p