He observed that on the Halloween card the Zodiac Killer had added the phrases By Fire, By Gun, By Knife and By Rope in four quadrants around the intersecting Paradice and Slaves, which may bear some relation to the unsolved 340 cipher. The word "By" was also present in the four quadrants of the 340 cipher, all running horizontally. If that was not curious enough, he noticed the possibility that the word Paradice ran down the center of the 340 cipher, and the word Slaves across its midsection, on the 10th row. In the following section we shall use this as our starting point and attempt to find some more connections to the Halloween card.
We shall add the words Fire, Knife and Rope underneath the words "By" on the 340 cipher (By Gun runs upwards to remain in its respective quadrant). On the Halloween card the Zodiac Killer placed Fire, Gun and Rope next to the letter B of "By". But the word Knife is placed next to the letter Y of "By" (as it runs vertically). In the diagram below Fire, Gun, Knife and Rope have been colored in.
Therefore out of the five E's on the Halloween card, four would fall over a directional symbol, either < or > (Fire would not). If we transposed this E onto the fourth symbol on the top row of the 340 cipher, the word Here is formed.
This would now connect five directional symbols to the letter E. In the above examples, three E's are represented by > symbol and two E's are represented by < symbol. But it would be nice to have five the same.
The Halloween card has many interesting features, but in terms of focusing in on individual alphabetical letters, the Zodiac Killer does two things. He mirrors the letter N in By Knife and underlines LAV in Paul Averly on the envelope. If we then produce a mirror image of all the symbols on the 17th line of the 340 cipher (to correct the reversed N in Knife), the < (E) of Paradice becomes >. If we take a mirror image of all the characters on the 10th line of the 340 cipher, including Slaves (LAV), the < (E) of Slaves becomes >. Therefore all five E's would now be represented by the symbol >.