1969-1970
Robert Graysmith, the cartoonist for The San Francisco Chronicle, gazed at the puzzles. He saw the letter from The Zodiac Killer to the Editor; he was sure that Paul Avery knew who was the killer.
'You're a cartoonist, Robert; you're not a cop'.
'I like puzzles', Graysmith stated.
Avery nodded, and the game had started.
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