On July 31st 1969, the infamous Zodiac Killer took the wording "man is the most dangerous animal of all" from the utterances of Merian C. Cooper, which I have found quoted in only three newspapers prior to 1969. All three were from 1932, the release date of "The Most Dangerous Game" movie, whose associate producer was Merian C. Cooper. The author of the Confession letter and July 31st 1969 letters both seemingly plagiarized eight consecutive words from newspapers, 78 years and 37 years previous.
But if the Confession letter author scoured the newspapers from 1888, where would they most likely focus when composing the typed letters? There is a good chance that the Confession letter author would initially focus their search in the direction of notable "Jack the Ripper" events in the newspapers. Three of which were widely reported in the newspapers in early October 1888.
The "Saucy Jacky" postcard was postmarked October 1st 1888, just one day after the "double event" murders of Elizabeth Stride and Catherine Eddowes on September 30th 1888. The other, was a letter from September 29th 1888 to the Central News agency, eventually forwarded to the Metropolitan Police two days later. The text from this letter was featured in several American newspapers, including the Abilene Weekly newspaper from Kansas on October 4th 1888.
In total, we have "man is the most dangerous animal of all" from 1932, "it was about time for her to die" from 1888, "I shall cut off" from 1888, and "weary of life, and yet are most unwilling to die" from 1888, all mimicked in three communications linked to the Zodiac Killer. The September 29th 1888 letter somewhat resembling the Confession letter, turning "I shall cut off the lady's ear and send it to the police" into "I shall cut off her female parts and deposit them for the whole city to see". So were the Confession letters and Riverside Desktop Poem created close to one another? Both inspired from the newspaper archives of Jack the Ripper in 1888. Did the Zodiac Killer "not stop the game" promised in the Confession letter, when he began his "Most Dangerous Game" in the Bay Area in 1969?
JACK THE RIPPER AND THE CONFESSION LETTER THE HISTORICAL SIGNIFICANCE OF MURDER
EDWARD HYDE IN THE 408 CIPHER - DAVID ORANCHAK