United States Military Telegraph Ledgers (EC 1-21)
EC 2 War Department Ciphers Received Feb. 7 to June 26, 1862. (1862, Feb. 7 -- 1862, July 23)
EC 4 U. S. Military Telegraph. Strictly private. (1862, May 22 -- 1864, Feb. 3)
EC 5 War Department Ciphers Received From August 5, 1862 to Mch. 24, 1863. (1862, Aug. 5 -- 1863, Mar. 24)
EC 10 United States Military Telegraph, War Department. Received. Jany. 5th to July 31, 1864. (1864, Jan. 25 -- 1864, July 31)
EC 11 United States Military Telegraph, War Department. Received. Jany. 6th July 29, 1864. (1864, Jan. 26 -- 1864, July 31)
EC 12 Cipher Telegrams received at War Department from December 25th, 1864 to August 9th, 1866. (1864, Dec. 25 -- 1866, Aug. 9)
EC 13 Cipher Telegrams received at War Department from December 25th, 1864 to August 6th, 1866. (1864, Dec. 25 -- 1866, Aug. 8)
EC 18 United States Military Telegraph, War Department. Sent, Jany. 21, 1864 -- Dec. 7, 1865. (1864, Jan. 26 -- 1865, Dec. 2)
The Army of the Potomac and Fort Monroe Telegraph Ledgers (EC 22-25)
EC 22 Head Quarts A of P, Cipher Book, containing [stuck out] Sent and Received from August 29, 1862 to April 28, 1863. (1862, Aug. 29 -- 1863, April 27)
EC 23 Ciphers sent commencing April 29th 1863. (1863, Apr. 29 -- 1863, June 13)
EC 24 [Fortress Monroe] Ciphers Received from April 4 to Nov. 7, 1862. (1862, Apr. 4 -- 1862, Nov. 17)
Thomas T. Eckert Letterpress Books (EC 26-33)
EC 26 Vol. 1, Telegrams Received Maj. Eckert March 20 to May 12, 1864. (1864, Mar. 25 -- 1864, May 12
EC 28 Vol. 3, Telegrams Received Maj. Eckert June 10, 1864 to July 25, 1864. (1864, June 10 -- 1864, July 25)
EC 29 Vol. 4, Telegrams Received Maj. Eckert July 25, 1864 to Sept. 16, 1864. (1864, July 25 -- 1864, Sep. 16)
EC 31 Vol. 6, Telegrams Received, Major Eckert, Nov. 8, 1864 to Jany 21, 1865. (1864, Nov. 8 -- 1865, Jan. 21)
EC 32 Telegrams Received, June 4, 1865 to April 7, 1866. (1865, June 4 -- 1866, Apr. 7)
Charles Anderson Dana Telegraph Ledgers (EC 34-35)
United States Military Telegraph Code Books (EC 36-67)
EC 36 Memoranda Giving Location and C. of Cipher Keys arranged by Col. Anson Stager Sup.'t U.S. Military Telegraph for Use in the Transmission of Important Telegrams in the Service of the United States Government. (1865-1867)
EC 41 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #1] (1861-1862)
EC 42 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #1] (1861-1862)
EC 43 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #1] (1861-1862)
EC 44 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #1] (1861-1862)
EC 45 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #1] (1861-1862)
EC 46 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #1] (1861-1862)
EC 47 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #2] [approximately 1866]
EC 48 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #2] [approximately 1866]
EC 49 Cipher Book #5. [1864-1865?]
EC 59 Cipher Book #5. [1864-1865?]
EC 60 Cipher Book #5. [1864-1865?]
EC 62 Cipher Book #5. [1864-1865?]
EC 64 Cipher Book #5. [1864-1865?]
EC 65 Cipher Book #5. [1864-1865?]
EC 67 Cipher for Telegraphic Correspondence; arranged expressly for Military Operations, and for important Government despatches. [Cipher Book #9] [approximately 1865]
United States Military Telegraph Miscellaneous Ledgers (EC 68-72)
EC 68 Passes. (1862, Feb. 3 -- 1862, Apr. 17)
EC 71 Ledger of Telegram costs, number of words sent and received. (1865, Mar. -- 1865, June)
Thomas T. Eckert Miscellaneous Material Post Civil War (EC 73-76)
EC 74 Offices Atlantic & Pacific Telegraph Co. [approximately 1870]