Discussion of codes and ciphers in the Civil War naturally focuses on those used by armies and governments, but the LSU Libraries Special Collections holds a personal letter in which a sergeant of the 18th New York Infantry Regiment employed a cipher to criticize the lieutenants in his company for t....
"Civil War Treasures: Encrypted Criticism In The 18th New York Infantry,"
Civil War Book Review: Vol. 19
Available at: https://digitalcommons.lsu.edu/cwbr/vol19/iss4/24