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 b v. 1798 is thus b u b q

---

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