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Written above explanation page: No. One Cipher. Instructions glued to front fly leaf. List of cipher holders opposite p. 1, A letter and instructions within an envelope has been laid into this cipher book; letter, dated July 10, 1865 and repeated April 10th, 1867, is from Eckert to Captain R.C. Cloury(?), St. Louis, Missouri, in regards to the use and return of Cipher Book #5. Ms. page numbers.
Cryptography--Handbooks, manuals, etc Cryptography--United States United States--History--Civil War, 1861-1865--Communications--Sources United States--History--Civil War, 1861-1865--Cryptography United States. Military Telegraph Corps
Thomas T. Eckert papers, 1861-1877 (bulk 1862-1867) Thomas T. Eckert Papers, Decoding the Civil War
Purchased in part by the Library Collectors' Council from Seth Kaller, January 21, 2012.