In a previous article I examined the mailing days of every confirmed Zodiac letter mailed in San Francisco (including the Pines card) and discovered that 12 of the 19 communications (63%) were postmarked on either a Monday or Tuesday. Below I have looked at every deemed outlier "Zodiac" communication from August 10th 1969 to September 25th 1990 mailed outside of San Francisco, with the exception of the Concerned Citizen card (August 10th 1969) and the Forecast for Leo horoscope page (December 11th 1969). The eight communications marked in red are genuine Zodiac communications, but at least 14 have some merit. The only three that are seriously questionable, are the June 18th 1970, April 15th 1971 and June 29th 1972 letters (marked in blue). The SLA letter (Sunday, February 3rd 1974), Badlands card (Wednesday, May 8th 1974) and Red Phantom letter (Monday, July 8th 1974) have not been included in this analysis because they are not genuine Zodiac communications. Of the 17 communications listed below, only 4 were mailed on either a Monday or Tuesday (none on a Monday). The percentage of 63% for confirmed Mon/Tue mailings in San Francisco has now fallen to just 24%, with not one single communication carrying a Monday postmark (falling from 5 previously).. .
August 10th 1969 Concerned Citizen card Sunday (San Francisco)
October 7th 1969 Good Citizen letter Tuesday (unknown)
November 21st 1969 San Jose Code letter Friday (unknown)
December 7th 1969 First Fairfield letter Sunday (Fairfield)
December 10th 1969 Forecast for Cancer Wednesday (Sacramento)
December 11th 1969 Forecast for Leo Thursday (San Francisco)
December 16th 1969 Second Fairfield letter Tuesday (Fairfield)
June 18th 1970 Oakland A's letter Thursday (Vallejo)
October 17th 1970 Edward Adams card Saturday (Berkeley)
March 13th 1971 Los Angeles letter Saturday (Pleasanton)
April 15th 1971 Another Victim letter Thursday (unknown)
June 29th 1972 Novato letter Thursday (unknown)
August 1st 1973 Albany letter Wednesday (Albany)
May 2nd 1978 Channel Nine letter Tuesday (Los Angeles)
July 19th 1978 Scotch Tape letter Wednesday (Los Angeles)
March 8th 1981 Atlanta letter Sunday (Atlanta)
September 25th 1990 The Celebrity Cypher Tuesday (Oakland)
October 7th 1969 Good Citizen letter Tuesday (unknown)
November 21st 1969 San Jose Code letter Friday (unknown)
December 7th 1969 First Fairfield letter Sunday (Fairfield)
December 10th 1969 Forecast for Cancer Wednesday (Sacramento)
December 11th 1969 Forecast for Leo Thursday (San Francisco)
December 16th 1969 Second Fairfield letter Tuesday (Fairfield)
June 18th 1970 Oakland A's letter Thursday (Vallejo)
October 17th 1970 Edward Adams card Saturday (Berkeley)
March 13th 1971 Los Angeles letter Saturday (Pleasanton)
April 15th 1971 Another Victim letter Thursday (unknown)
June 29th 1972 Novato letter Thursday (unknown)
August 1st 1973 Albany letter Wednesday (Albany)
May 2nd 1978 Channel Nine letter Tuesday (Los Angeles)
July 19th 1978 Scotch Tape letter Wednesday (Los Angeles)
March 8th 1981 Atlanta letter Sunday (Atlanta)
September 25th 1990 The Celebrity Cypher Tuesday (Oakland)
If the Zodiac Killer had just visited these locations fleetingly or on vacation (unconstrained by the working week), one might expect a more random mailing day. And this is exactly what we see in the results. Of the 8 confirmed communications (marked in red), only the Second Fairfield letter (December 16th 1969) and Channel Nine letter (May 2nd 1978) mailed in Los Angeles were postmarked Tuesday. In the previous analysis, just one communication (5%) was postmarked either Wednesday or Thursday (none on Wednesday), rising to 6 out of 16 here (38%). The only communication postmarked Thursday previously, was the collective trinity of letters mailed to the Vallejo Times-Herald, San Francisco Chronicle and San Francisco Examiner on July 31st 1969, with the express directive that they be published on Friday, August 1st 1969 (so he could go on a kill rampage over the weekend if his demands were not met). Therefore, in this instance, the postmark day came with a purpose other than his working schedule.
The idea put forward previously was a killer who prepared his communications in Vallejo over the weekend and delivered them on a Monday when traveling into work in San Francisco. Depending on what hour on Monday he mailed his communications (before, during or after work) could have resulted in a later collection time and Tuesday postmark. But if the Zodiac Killer was unconstrained by his work schedule through vacation time, he had the option to mail his communications anytime. In other words, when he traveled further afield he may not have been working. It must be noted that when the Zodiac Killer mailed his most distant exploits in communications from Atlanta and Albany, he drew attention to his letters by placing small crosshairs on the address side of his envelope, as he had done on the October 13th 1969 "Paul Stine" envelope, which of course, had not been released into the public domain by March 8th 1981.
The idea put forward previously was a killer who prepared his communications in Vallejo over the weekend and delivered them on a Monday when traveling into work in San Francisco. Depending on what hour on Monday he mailed his communications (before, during or after work) could have resulted in a later collection time and Tuesday postmark. But if the Zodiac Killer was unconstrained by his work schedule through vacation time, he had the option to mail his communications anytime. In other words, when he traveled further afield he may not have been working. It must be noted that when the Zodiac Killer mailed his most distant exploits in communications from Atlanta and Albany, he drew attention to his letters by placing small crosshairs on the address side of his envelope, as he had done on the October 13th 1969 "Paul Stine" envelope, which of course, had not been released into the public domain by March 8th 1981.
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