Thomas Jefferson Papers
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II. Cipher Table, [April 1803?]

II. Cipher Table

[April 1803?]

suppose the key word to be ‘antipodes’

write it thus. a n t i p o d e s a n t i p o d e s a n t i p o d e s
to be cyphered t h e m a n w h o s e m i n d o n v i r t u e b e n t
u v y v q b & m g t s f r c s s s n j e m c u q i t m

then copy out the cyphered line thus. uvyvqb&mgtsfrcsssnjemcuqitm

numbers are thus. 18. is bv. 1798 is thus bubq

the method is this.

look for t. in the 1st. vertical column, & a in the 1st horizontal one. gives u
h n v
e t y
m i v
a p q
n o b

MS (DLC: TJ Papers, 131:22608); undated; entirely in TJ’s hand; endorsed by him: “Cypher establd. with Captain Lewis” and “key. Artichokes.”

copy out the cyphered line thus: the final letters of the encipherment should be s and l rather than t and m.

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