[dateline] Philadelphia 26th: December 1781
I have not yet been made certain, that you comprehend that Cypher which I used in
my Letters to you, and which will yet awhile be used.
You are to form Alphabets equal in number and of the same commencement and Range,
as the Letters of the first sixth part of the family Name where you and I supped last
with Mrs. Adams, and you are to look alternately into those constructed Alphabets
opposite to my figures, for the Elements to spell with, some figures however I may
have used as Baulks.1