Message #143660

[Copperhead]

In his July 26, 1970 letter, the Zodiac paraphrased a song from The Mikado, adding his own lyrics about making a "little list" of the ways he planned to torture his "slaves" in "paradice." The letter was signed with a large, exaggerated cross circle symbol and a new score: " = 13, SFPD = 0."[35] A final note at the bottom of the letter stated, "P.S. The Mt. Diablo code concerns Radians + # inches along the radians."[36] In 1981, a close examination of the radian hint by Zodiac researcher Gareth Penn led to the discovery that a radian angle, when placed over the map per Zodiac's instructions, pointed to the locations of two Zodiac attacks.[37]

On October 7, 1970, the Chronicle received a three-by-five inch card signed by the Zodiac with the  drawn with blood. The card's message was formed by pasting words and letters from an edition of the Chronicle, and thirteen holes were punched across the card. Inspectors Armstrong and Toschi agreed it was "highly probable" the card came from the Zodiac.[38]