I believe that Zodiac, possibly in the 340 cipher, clued in on the numerical game that I believe he played.
Q. KITE? what numerical game are you referring to?
A. I believe that Zodiac used SIX dates and their LOCATIONS in a numerical game that involved circles. But, as of the sending of the 340 cipher (November, 1969), up to that point, I believe he had acted on FOUR of the six dates. They are:
7+4+69=80 Vallejo(77)+Zodiac(58)=135 Vallejo total: 135x2=270
10+11+69=90 San Francisco(122)+Zodiac(58)=180
So, what I showed there was that when the dates were added, they resulted in the number string 100-80-105-90 with the intended eventual result, in my estimation, being the number string 80-85-90-95-100-105 (in other words 85 and 95 are still needed). And then this number string could be put to a circle and lines drawn thru the center could cover all 12 points.
With the LOCATIONS, I used number-for-letters such as (A=1, B=2, Z=26 etc.). For example, Zodiac (58) means that Z(26)+O(15)+D(4)+I(9)+a(1)+C(3)=58. I believe that Zodiac wanted the LOCATIONS + ZODIAC to add up to (90,180,270,360), the points of a circle, and in this way he was promoting revolution(revolt) by alluding to the revolution (once around) of a circle.
The next date Zodiac acted on, after the sending of the 340 cipher, in my opinion, was:
6-19-70 San Francisco (if I'm not mistaken). That would fit the numerical game, in my estimation, since the needed 95 results with 6+19+70=95 and the doubling up of San Francisco((122)+Zodiac(58)=180. San Francisco total: 360:) also results (if I'm not mistaken on that location).
* I also believe that Zodiac acted on 3-22-70, which is a 95 total date (3+22+70=95), but, in my opinion, no situation unfolded for what Zodiac intended to happen on that day, on a 95 date. In other words, Zodiac may have also been driving around on 4-21-70 and 5-20-70 (both 95 dates), and only ended up acting, was only able to, on 6-19-70. He may have approached, considered, and balked at acting on many or several occasions possibly during 1969-70?
So, the 6-19-70 DATE is the one that I believe Zodiac clued in on in the 340 cipher.
Q. KITE? So how did he clue in on that 6-19-70 DATE as you believe he did in the 340 cipher?
A. I believe that Zodiac clued in on what would end up being the 6-19-70 DATE in 3 ways.
(1) I believe that Zodiac included in the 340 text, the words..... (A PILLS GAME). A PILLS GAME has a number-for-letters of 95. (A(1)+PILLS(68)+GAME(26)=95). Arguably, Zodiac referred to a (GAME) if he was the one who chose and sent in the 10-27-70 Halloween Card? (wasn't it something like....but then why spoil our game?)
(2) In the 340 cipher, in my opinion, Zodiac includes a downward reading of the word Attack by using ATAK. In my opinion this is part of an overall reading of downward words that make the message:
KEPT(PTEK) IN BARS TILL ATAK LOSE LEASH. With this message, I believe that Zodiac was lecturing that the restraints imposed by society must be Attacked. And, I believe that Zodiac believed he was attacking(ATAK) the restraints with the numerical game I believe he played.
So, as far as the word ATAK alluding to the 6-19-70 date, the word ATAK, read downward in the 340 cipher, begins on the 180th symbol or position.
(3) The 340 text, in my opinion, closes with the sentence...(The pig stalls deal eighth soel slain).
So, in summary, in my estimation, there are 3 clues in the 340 cipher that were meant to match up with what would end up being the 6-19-70 DATE:
A PILLS GAME=95.......6-19-70 (6+19+70=95)
ATAK on 180th symbol..........San Francisco(122)+Zodiac(58)=180
The Pig stalls deal eighth soel slain.........The unsolved (If I'm not mistaken) 6-19-70 case
I would also add that the 6-26-70 Zodiac communication, if that is correct, closes with a sentence that adds up to 360 in numbers-for-letters, if I'm not mistaken. (The sentence referring to a man in a parked car and possibly alluding to the 6-19-70 case). I believe that Zodiac was responsible for the 6-19-70 case, did allude to it in the 6-26-70 communication, in my opinion, and also did intentionally craft a closing sentence in the 6-26-70 communication that added up to 360 as part of the numerical game I believe he played to allude to revolution(revolt) with once around a circle(revolution).