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Book Five

Ch. 20

267

Chapter XX
On Mixed Inverted Transposition:
By Limitation of a Fixed Number.

The basis of the next division has been indicated in the beginning of the preceding chapter.  To assist to the understanding of this Mode, I will put first the table, taken from de Vigenere, pp. 96 and 97, 186 and 187.

 

 

AB

CD

EF

GH

IL

MN

OP

QR

ST

VX

YZ

 

 

I

II

III

IIII

V

VI

VII

VIII

IX

X

XI

A

1

al

bt

gs

dr

eq

uy

zp

ho

fx

in

cm

B

2

ab

gt

ds

er

uq

zy

hp

fo

ix

cn

lm

C

3

ag

dt

es

ur

zq

hy

fp

io

cx

ln

bm

D

4

ad

bg

et

us

zr

Hq

fy

ip

co

lx

mn

E

5

ae

bd

ut

zs

hr

fq

Iy

cp

lo

mx

gn

F

6

au

be

gd

zt

hs

Fr

iq

cy

lp

mo

nx

G

7

az

bu

ge

ht

fs

ir

cq

ly

mp

no

dx

H

8

ah

bz

gu

de

ft

is

cr

Lq

my

np

xo

I

9

af

bh

gz

du

it

cs

lr

mq

ny

xp

eo

L

10

ai

bf

gh

dz

eu

ct

ls

mr

Nq

xy

op

M

11

ac

bi

gf

dh

ez

lt

ms

nr

xq

oy

up

N

12

al

bc

gi

df

eh

uz

mt

ns

xr

Oq

py

O

13

am

bl

gc

di

ef

uh

nt

rs

or

pq

zy

P

14

an

bm

gl

dc

ei

uf

zh

rt

os

pr

Yq

Q

15

ax

bn

gm

dl

ec

ui

zf

ot

ps

yr

hq

R

16

ao

bx

gn

dm

el

uc

zi

hf

pt

ys

qr

S

17

ap

bo

gx

dn

em

ul

zc

hi

yt

gs

fr

T

18

ay

bp

go

dx

en

um

zl

hc

fi

gt

rs

V

19

aq

by

gp

do

ex

un

zm

hl

fc

rt

is

X

20

ar

bq

gy

dp

eo

ux

zn

hm

fl

ic

st

Y

21

as

br

gq

dy

ep

uo

zx

hn

fm

il

ct

Z

22

at

bs

gr

dq

ey

up

zo

hx

fn

im

cl

This table is formed according to the list of Hebraic letters;

ABGDEUZHFICLMNXOPYQRST. 

It contains eleven alphabets, each alphabet consisting of a double set of letters,
with two letters written in each square;
the design being to allow…