**1.96 square mile circle**represented by the punch-hole. Then we measured the radian angle between the home of Donna Lass and Yuba Gap, and the radian angle between the Sahara Tahoe Hotel & Casino and Yuba Gap, which both fell between 303 to 304 degrees. Five radians and magnetic north was 303.5 degrees in 1970. The three measurements of radians and inches (set to Magnetic North) that Zodiac suggested we use to locate his buried bomb on June 26th 1970 and July 26th 1970 can all be used in relation to the Pines postcard. The 2.19 inches from Clair Tappaan Lodge Sierra Club and the 5 radians set to Magnetic North from Donna's home or workplace, both fall inside the punch-hole on the Pines postcard.

**"**

**The Mt. Diablo Code concerns Radians & # inches along the radians"**and positioned a crude black circle around his crosshairs, close to 4 radians and Magnetic North (246.2 degrees). It was clear that to locate his buried bomb we had to first use radians to locate a position around the circumference of his crosshairs and then use inches along that radian to pinpoint the target. The location "concerned" radians and inches, so the claimed buried bomb was likely to be close to a whole value but not necessarily exact.

The Zodiac Killer's measurements were probably nothing more than a rough guide in 1970, which is why he placed SFPD next to the crude circle to help us on our way. Therefore, it was quite surprising to discover that both Yuba Gap and the center of the punch-hole were situated extremely close to 5 radians and Magnetic North (at most a one degree error). The distance between the Sahara Tahoe Hotel & Casino and Yuba Gap, and the home of Donna Lass and Yuba Gap measured 6.83 and 6.86 inches respectively (an 83% to 86 % accuracy over one inch). Both distances were approaching 44 miles by crow. A distance of 44.8 miles would have been 7 inches.

**crude circle**. If the author of the Pines postcard wasn't the Zodiac Killer (and the 5 radians and Magnetic North from abduction to burial was intentional), then this individual would have made exactly the same error as the Zodiac Killer by using clockwise radians from the north position. How likely is that?