How does one go about finding records for a family member believed to have been a prisoner at Andersonville? The name is either WILLIAM MERCER, born 1831, Belmont Co., Oh, or his brother, THOMAS J. MERCER, B. 1833, Belmont Co. Ohio. I am new both to this search and the site.and need guidance. Much thanks for any help. Patty Mercer ( pam2570@aol.com )