(45) And this was the 2178 a.m. nrst year of the fourth week of the forty-fifth jubilee.

(84) The most simple numerical cipher is that in which the letters of the alphabet are exchanged for numbers in ordinary sequence. Thus A becomes 1, B 2, C 3, and so on, counting both I and J as 9 and both U and V as 20. The word yes by this system would be written 23-5-18. This cipher can be made more difficult by reversing the alphabet so that Z becomes 1, Y 2, X 3, and so on. By inserting a non-significant, or uncounted, number after each of the significant numbers the cipher is still more effectively concealed, thus: 23-16-5-9-18. The word yes is found by eliminating the second and fourth numbers. By adding 23, 5, and 18 together the sum 46 results. Therefore 46 is the numerical equivalent of the word yes. According to the simple numerical cipher, the sum 138 is equal to the words Note carefully. Therefore in a book using this method, line 138, page 138, or paragraph 138 may contain the concealed message. In addition to this simple numerical cipher there are scores of others so complicated that no one without the key can hope to solve them.

(30) And in the first year of the sixth week he 2143 went up to Salem, to the east of Shechem, in peace, in the fourth month.