( noDate conjectural )
1809 to 1812
Original paper slip text:n.d. [1809–1812?]
Explanation of cipher (lock and key system)
4 p. (in JQA's hand)
JQA—Ciphers
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Adams Papers microfilm: reel 602. TS Ciphers JQA
Original held by:Massachusetts Historical Society
From the collection: Adams Family Papers
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