Z408 Cipher Decoded

Encrypted & Decrypted Grids With Complete Symbol Key

Published: February 8, 2026 — TheDecipherist

Property	Value
Date Sent	July 31, 1969
Length	408 characters
Solved By	Donald and Bettye Harden
Solved Date	August 8, 1969 (1 week)

Z408 — ENCRYPTED (17 columns × 24 rows)

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
1.	△	◪	P	/	Z	/	U	B	◪	Ʞ	O	R	ᴷ	ꟼ	X	ᴷ	B	1.
2.	W	V	+	∃	G	Y	F	⊙	△	H	P	⊡	K	I	Ϙ	Y	∃	2.
3.	M	J	Y	∧	U	I	Ʞ	△	Ϙ	T	⊥	N	Q	Y	D	●	⊖	3.
4.	S	φ	/	△	■	B	P	O	R	A	U	◪	ꟻ	R	J	Ϙ	E	4.
5.	Ʞ	∧	L	M	Z	J	⊙	Я	\	ꟼ	F	H	V	W	∃	△	Y	5.
6.	⊡	+	Ϙ	G	D	△	K	I	⊖	⊙	Ϙ	X	▲	●	⊕	S	φ	6.
7.	R	N	⊥	I	Y	∃	⊥	O	▲	Ϙ	G	B	T	⊙	S	■	B	7.
8.	L	⊙	/	P	■	B	⊡	X	Ϙ	E	H	M	U	∧	R	R	Ʞ	8.
9.	⊃	Z	K	Ϙ	ꟼ	I	⊖	W	Ϙ	I	▲	●	L	M	Я	△	■	9.
10.	B	P	D	R	+	T	ᴷ	⊙	\	N	φ	∃	E	U	H	Ʞ	F	10.
11.	Z	⊃	ꟼ	O	V	W	I	●	+	⊥	L	⊖	J	∧	R	⊙	H	11.
12.	I	△	D	R	◻	T	Y	Я	\	⊙	∃	/	⊡	X	J	⊙	A	12.
13.	P	●	M	▲	R	U	⊥	◪	L	⊖	N	V	E	K	H	ᴷ	G	13.
14.	Я	I	I	J	Ʞ	●	△	▲	L	M	J	N	A	⊖	Z	φ	P	14.
15.	⊕	U	ꟼ	Ʞ	A	△	■	B	V	W	\	+	V	T	⊥	O	P	15.
16.	∧	ᴷ	S	Я	J	ꟻ	U	∃	⊙	△	D	⊕	G	◪	◪	I	M	16.
17.	N	Ʞ	⊖	S	⊃	E	/	△	◪	◪	Z	ꟻ	A	P	■	B	V	17.
18.	ꟼ	∃	X	Ϙ	W	Ϙ	◻	F	■	▲	⊃	+	⊡	△	A	△	B	18.
19.	◪	O	T	●	R	U	⊃	+	◻	⊙	Y	Ϙ	◻	∧	S	Ϙ	W	19.
20.	V	Z	∃	G	Y	K	E	◻	T	Y	A	△	◪	■	L	⊥	◻	20.
21.	H	I	F	B	X	△	⊕	X	A	D	⊙	\	△	L	I	ᴷ	Ϙ	21.
22.	◻	∃	⊙	■	■	⊙	∃	●	P	O	R	X	Q	F	◪	G	⊃	22.
23.	Z	⊡	J	T	⊥	Ϙ	◻	▲	J	I	+	Я	B	P	Q	W	⊙	23.
24.	V	E	X	Я	△	W	I	⊙	Ϙ	E	H	M	⊖	ᴷ	U	I	Ʞ	24.
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17

Z408 — DECRYPTED (17 columns × 24 rows)

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
1.	I	L	I	K	E	K	I	L	L	I	N	G	P	E	O	P	L	1.
2.	E	B	E	C	A	U	S	E	I	T	I	S	S	O	M	U	C	2.
3.	H	F	U	N	I	T	I	S	M	O	R	E	F	U	N	T	H	3.
4.	A	N	K	I	L	L	I	N	G	W	I	L	D	G	A	M	E	4.
5.	I	N	T	H	E	F	O	R	R	E	S	T	B	E	C	A	U	5.
6.	S	E	M	A	N	I	S	T	H	E	M	O	S	T	D	A	N	6.
7.	G	E	R	O	U	S	A	N	I	M	A	L	O	F	A	L	L	7.
8.	T	O	K	I	L	L	S	O	M	E	T	H	I	N	G	G	I	8.
9.	V	E	S	M	E	T	H	E	M	O	S	T	T	H	R	I	L	9.
10.	L	I	N	G	E	X	P	E	R	E	N	C	E	I	T	I	S	10.
11.	E	V	E	N	B	E	T	T	E	R	T	H	A	N	G	E	T	11.
12.	T	I	N	G	Y	O	U	R	R	O	C	K	S	O	F	F	W	12.
13.	I	T	H	A	G	I	R	L	T	H	E	B	E	S	T	P	A	13.
14.	R	T	O	F	I	T	I	S	T	H	A	E	W	H	E	N	I	14.
15.	D	I	E	I	W	I	L	L	B	E	R	E	B	O	R	N	I	15.
16.	N	P	A	R	A	D	I	C	E	A	N	D	A	L	L	T	H	16.
17.	E	I	H	A	V	E	K	I	L	L	E	D	W	I	L	L	B	17.
18.	E	C	O	M	E	M	Y	S	L	A	V	E	S	I	W	I	L	18.
19.	L	N	O	T	G	I	V	E	Y	O	U	M	Y	N	A	M	E	19.
20.	B	E	C	A	U	S	E	Y	O	U	W	I	L	L	T	R	Y	20.
21.	T	O	S	L	O	W	D	O	W	N	O	R	S	T	O	P	M	21.
22.	Y	C	O	L	L	E	C	T	I	N	G	O	F	S	L	A	V	22.
23.	E	S	F	O	R	M	Y	A	F	T	E	R	L	I	F	E	E	23.
24.	B	E	O	R	I	E	T	E	M	E	T	H	H	P	I	T	I	24.
	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17

Z408 Symbol Key

Reversed/Rotated Letters:

Ʞ = Reversed K (backwards K)
ᴷ = Sideways K (rotated 90°)
ꟼ = Reversed P (backwards P)
ꟻ = Reversed F (backwards F)
Ϙ = Reversed Q (backwards Q)
Я = Reversed R (backwards R)
∃ = Reversed E (backwards E)

Shapes:

△ = Outline triangle
▲ = Filled triangle
◻ = Outline square (no fill)
■ = Filled square
⊡ = Square with dot in center
◪ = Square with diagonal line (lower-right half filled)

Circles:

O = Letter O (empty circle)
⊙ = Circle with dot in center
● = Filled circle
⊖ = Circle with horizontal line
⊕ = Circle with cross (crosshairs — Zodiac signature)
φ = Phi symbol

Other Symbols:

⊃ = Reversed C (backwards C)
∧ = Caret / Lambda
⊥ = Upside-down T
\ = Backslash

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