ZODIAC CIPHERS
Richard Grinell, Coventry, England
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TWELVE REASONS OF SE7EN IN TWO ZODIAC CIPHERS

1/10/2021

 
It is with little doubt that the 148 character cipher and letter mailed in May 1971 and the Albany letter and cipher mailed on August 1st 1973 were both created by the Zodiac Killer. Neither of the communications were published in the newspapers, yet both have overlapping features in not only the way they were written, but in the style and choice of ciphertext characters in each code. The Zodiac Killer ended his murder count on March 13th 1971 with 17+ victims, apparently updating this total to 37 victims on January 29th 1974 with the arrival of the Exorcist letter. The author of the 148 character cipher letter (which I will now refer to as the Skin letter) claimed he would murder again, stating "I done it 21 times", with the author of the Monticello card mailed on July 13th 1971 claiming he had "shought victim 21". The only communications between March 13th 1971 and January 29th 1974 referring to a progressing victim total, and both carried the same count of 21 despite both being unpublished. We know the Monticello card to be a genuine Zodiac correspondence because of the running theme of the Snoozy & Furlong murders in San Jose, that featured in the Zodiac communications over a two-year period, including the choice of Monticello and the Oak Hill Memorial Park in the neighborhood of San Jose. The Story of San Jose.

For the handwriting aficianados, the capital letter G present in both the 408 and 340 ciphers is noticeable in both the Albany letter and Skin letter, as is the threat of a "next time" and a "next victim". The Albany letter threatens to "start killing again", with the Skin letter threatening "I must kill more". However, all this is incidental when we consider the boxy style of both ciphers and the ciphertext characters the Zodiac Killer chose. Never before had the Zodiac Killer chosen the sun cross symbol, yet it featured in both the Albany letter cipher and the Skin letter cipher. I won't list all the correlations, because it's far easier to show the overlapping features contained in both unpublished ciphers.  
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There are the same errors in coding in the 148 character cipher as displayed in the 340 cipher, with the 148 character cipher spelling simple words incorrectly such as "this" to "tis", "speaking" to "speacking" and "to" to "t". He also misses the word "is" out of the introduction entirely. There is also a scrubbed out letter in the 18th position on the top row. However, this time the cipher is created in such a way that no word runs from one row into another, making it 21, 21, 24, 23, 25, 23 and 11 = 148 characters. The revised message, with corrected sections, is:
"T(h)is (is) the Zodiac Speacking. Why can't you stop me. I can't stop killing. Stop listening t(o) phonys. If this is not on the front page in a week I will skin 3 little kids and make a suit from the skin".
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The use of numbers in both sequences of ciphertext is evident, as is the use of a sun cross on both occasions. The number 7 in both ciphers is used to represent the letter A. The Skin letter and Albany letter are the only two letters mailed by a potential Zodiac Killer from May 1971 to August 1st 1973. We know of no other certain Zodiac communications during this period of time (other than the Monticello card), yet here we have two consecutive ciphers, both of which use the ciphertext number 7 as the letter A. If these two letters were mailed by two independent authors, then that is one hell of a coincidence. Because we can confidently link the Skin letter to the Monticello card through "21" and the Snoozy/Furlong murders, it is a fair statement to say that the Albany letter is a genuine Zodiac communication.
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The best way of confirming the authenticity of potential Zodiac letters, cards and ciphers is to make comparisons between multiple communications, particularly through unpublished mailings which have no way of being copied by hoaxers. The alternative approach, is to just look at the handwriting and make a judgment based on nothing more than letter strokes which can easily be changed by the author. The third option, is to rely on the determination of others and remove independent thinking from the equation altogether.  

FOLLOW UP ARTICLE SHOWING WHY THE 148 CHARACTER CIPHER & LETTER IS AUTHENTIC ZODIAC CORRESPONDENCE 

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    The Zodiac Killer may have given us the answer almost word-for-word when he wrote PS. The Mt. Diablo Code concerns Radians & # inches along the radians. The code solution identified was Estimate: Four Radians and Five Inches To read more, click the image.
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Photos used under Creative Commons from Marcin Wichary, zAppledot, vyusseem, Alex Barth, Alan Cleaver, jocelynsart, Richard Perry, taberandrew, eschipul, MrJamesAckerley