With the accompanying 'Dripping Pen' card, the Zodiac Killer mailed us a message "This is the Zodiac speaking. I though you would nead a good laugh before you hear the bad news. You won't get the news for a while yet. Could you print this new cipher in your frunt page? I get aufully lonely when I am ignored, so lonely I could do my Thing."
Using the deciphering of the History Channel (right side) I have attempted to fill in the blanks on the first six lines. The green lettering is from the History Channel. The yellow lettering is my calculated decryption. The pink lettering is far more speculative.
The reasoning behind the opening two words "my thing," is partially derived from the threat on the 'Dripping Pen' card, possibly left as a clue by the killer, and the code itself. The solve reads:
MY THINGS, I KILL BOTH NIGHT AND DAY. I LIVE BY THE GUN BARREL AIM AND LIKE FISHING FOR GOLDFISH OVER PIGS. I MISS GOLDILOCKS NOW.
If you have a better decryption for the pink and yellow areas, please post them in the comments below. The 340 Cipher.