"Mon Oct 12, 1970. Edward Adams. The Zodiac is going to change the way of committing murders. I shall announce when I shall commit my murders, The Adamses are Next. you taught me to mean it. ADAMS YOU ARE NEXT. Zodiac".
When you look at many personal ads, often they begin with something like "Joe's Hair Salon" and then advertise their business. The advertisement below begins with Zodiac, so it's extremely likely that the author of the advertisement is either Zodiac, or somebody pretending to be the Bay Area murderer. The person "ZODIAC" is addressing in the advertisement, is found at the end of the message with the initials R.A. Lyndon Lafferty, author of the book, The Zodiac Killer Cover Up: The Silenced Badge identified an individual who worked at Gladman Hospital in Oakland. He was a psychiatrist by the name of Richard H. Adler, thereby giving us the initials R.A. We now have an October 17th 1970 and August 26th 1976 message with an extremely similar threat, and both recipients were psychiatrists, living and working in close proximity to one another. If the Zodiac Killer (or an impersonator) was addressing Richard H. Adler, then he may be stating "Surrender to the Imperial Wizard or I'll terminate your case". The phrase "terminate your case", applicable in respect to psychiatry and their patients. One has to weigh up the likelihood of this personal ad being authored by an educated and respected psychiatrist, or an unhinged individual making veiled threats.
The San Francisco Center for Psychoanalysis was organized in 2007, combining the San Francisco Psychoanalytic Institute & Society, founded in 1941, with the San Francisco Foundation for Psychoanalysis, founded in 1991. The Center provides an extensive training program in psychoanalysis. The Center also sponsors a large, vibrant Extension Division which offers classes and seminars to mental health professionals as well as to the general public. The San Francisco Psychoanalytic Society and Institute is a facility for psychoanalytic research, training, and education located on 2420 Sutter Street in San Francisco, California. It is situated in Lower Pacific Heights, approximately one mile from the intersection of Washington and Cherry.
In a previous article we showed with a high degree of probability that the 13 Hole Postcard mailed on October 5th 1970 was connected to the as yet unpublished Little List Letter through its wording, and therefore both were authored by the Zodiac Killer. Most people accept that the Little List Letter is authenticated Zodiac correspondence, so by extension, if the October 17th 1970 Edward C. Adams Letter and "Deep Real Estate" Letter were authored by the same person, and we can connect the two pasted letters in October 1970, then we can verify Zodiac was responsible for all. This would mean that Edward C. Adams suspicions that the letter mailed to his home address in Orinda by a former psychiatric patient who resided in Berkeley, could have been the Zodiac Killer.