Military Telegraph during the Civil War
PLUM, William. The Military Telegraph During the Civial War. Means of Communication, and of the Federal and Confederate Cipher Systems; also a Running Account of the War between the States. Chicago: Jansen, McClurg & Company, 1882. 1st ed. 2 Vols. xii,[9]-377;390pp. Portrait frontises., illus., portraits, maps. A very good copy.....