KEY TO NUMBER CIPHER

Divide off into additions of nine or eight. Thus if extraneous figures have been inserted, they can be detected and deleted.

Cipher.

 

De-Cipher.

A

=

9

 

O

=

Repeat Letter

B

=

54

 

125

=

P

C

=

63

 

143

=

R

D

=

72

 

161

=

S

E

=

18

 

18

=

E

F

=

81

 

216

=

G

G

=

216

 

234

=

H

H

=

234

 

252

=

K or Q

I

=

27

 

27

=

I

K.Q

=

252

 

323

=

T

L

=

414

 

341

=

X or Z

M

=

432

 

36

=

O

N

=

612

 

414

=

L

O

=

36

 

432

=

M

P

=

125

 

45

=

U or V

R

=

143

 

521

=

Y

S

=

161

 

54

=

B

T

=

323

 

612

=

N

U.V

=

45

 

63

=

C

X.Z

=

341

 

72

=

D

Y

=

521

 

81

=

F

Repeat

=

O

 

9

=

A