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Telegraph key, 1860sCivil War telegraph sending-key in working order, living history demonstration, Shiloh National Battlefield, Tennessee. Digital photograph
Little Round Top signal station, Battle of GettysburgGeneral G. K. Warren at the signal station on Little Round Top observing troop positions, Battle of Gettysburg, 1863. Hand-colored woodcut of a 19th-century illustration
Telegraph in operation, 1860s artifactCivil War field telegraph sending-key in working order, living history demonstration, Shiloh National Military Park, Tennessee. Digital photograph
EVCW2A-00062Union Army Signal Corps setting up telegraph wire during a Civil War battle, 1863. Hand-colored woodcut of a 19th century illustration
