Roberts Community and Education Center, 4681 School St., Acworth. “Chattahoochee River Line.” Shaffer will share information from the Colley journals. Shaffer is a historian, author, newspaper columnist and teaches Civil War courses at Kennesaw State University. Shaffer is president of the River Line Historic Area and a Civil War consultant for the Friends of Camp McDonald. He is a frequent lecturer and a member of several Civil War historical associations.