Leona Roberts was abducted from her boyfriend's apartment at 749 Tormey Avenue in Rodeo at approximately 6:00pm on December 10th 1969, and her naked body was found on December 28th 1969 by an elderly man collecting driftwood near Bolinas Lagoon. The coroner estimated she had been alive 10 to 14 days after her abduction, with the sheriff's office stating she had been dead about 10 days. This suggests she was murdered (or had died in captivity) sometime between December 18th and December 24th 1969.
Two of the least understood communications possibly mailed by the Zodiac Killer were the Day-by-day forecast for Cancer and Day-by-day forecast for Leo horoscopes, with the first mailed from Sacramento to the Sacramento Bee newspaper on December 10th 1969 and the second from San Francisco to the San Francisco Newspaper Printing Company, P.O. Box 3100, Rincon Annex, San Francisco on December 11th 1969. The Day-by-day forecast for Cancer pasted horoscope page contained the prominent words Want, Zodiac and Watch, and the phrase "Birds Fly South". One notable feature on the horoscope page was the word "Cancer", which had been ringed in the page title.
The following day, on December 11th 1969, the Day-by-day forecast for Leo horoscope page was mailed, but the word Leo had not been ringed in the page title. However, this communication arrived one day after the abduction and eventual murder of Leona Roberts, whose body was ultimately discovered alongside Bolinas Lagoon in Marin County on December 28th 1969. The coroner concluded she had been kept alive for a duration of 10 to 14 days after her abduction, with the sheriff's office stating she had been dead about 10 days. This makes the Day-by-day Forecast for Leo(na Roberts) horoscope page very interesting indeed, because it may imply a forecast for Leona Roberts rather than an immediate murder. Additionally, neither of these two communications (with one containing the word Zodiac) were public knowledge on January 4th 1970, when somebody telephoned Peggy Trainer, identified himself as the Zodiac Killer, and stated she would be his next victim. Peggy Trainer lived in the same building at 749 Tormey Avenue, Rodeo, where Leona Roberts was abducted from. This links both the phone call and December 10th 1969 communication to the pseudonym "Zodiac", and to the day of her abduction.
The Day-by-day forecast for Cancer horoscope page was mailed on the same day as Leona Roberts abduction, containing the phrase "Birds Fly South". It has been difficult to find the meaning behind the author's choice of pasted words, but one thing we know about the Zodiac Killer is his inspiration was often sourced from literature and film, such as the short story The Most Dangerous Game by Richard Connell, first published on January 19th 1924 (or the resulting 1932 film version), the Gilbert & Sullivan comic opera, The Mikado, and The Exorcist film (1973), inspired by William Peter Blatty's 1971 book, to name just a few.
Bearing in mind this novel was first published in Marin County and has Birds Fly South in the title, it seems extremely coincidental that the body of Leona Roberts would be found alongside Bolinas Lagoon in Marin County, which is a major north-south Pacific Flyway for migratory birds in America, extending from Alaska to Patagonia. Every year, migratory birds travel some or all of this distance both in spring and in fall, following food sources, heading to breeding grounds, or travelling to overwintering sites.
The Day-by-day forecast for Cancer communication was not only mailed on the day of Leona Roberts' abduction, containing the pasted word "Zodiac", but contained the phrase "Birds Fly South", present in the title of a book first published in Marin County, where the body of Leona Roberts was ultimately found alongside the north-south Pacific Flyway of migratory birds at Bolinas Lagoon. The astrological sign of Cancer (circled in the forecast below) is the cardinal sign of the Water trigon. When we factor in the Day-by-day Forecast for Leo(na Roberts) horoscope page and the telephone call on January 4th 1970 in absence of either of these communications being made public, can we really lay all this at the door of coincidence?