Solution for the Zodiac letter dated 26, June 1970;
The first step is to determine which are letters, Greek letters numbers or symbols. You do this by using the key word "Allen," to numerically subtract from the cipher. The 8 groups of 4 cipher letters add up to 12 ( L is the 12th letter). Symbols and numbers would be "0" What you get would be; 2,8,2,0, 0,1,1,10, 5,0,6,1, 0,3,3,6, 5,3,3,1, 3,2,7,0 0,2,2,8, 0,4,1,7. Putting Greek letters in lower case you would get; C,d J,1, "box," o,K,u A,m,F,d "omega," o,R,T G,m,th,F, D,v,T "double d," h,C,e,g, "gunsight," rho,w,d: Allen-1=Zodiac. letters-1 and disoriented letters +1. This would give you; B,d,i,1, "box,"o,L,u, Z,m,E,d, "omega,"o,P,S, F,x,P,E, C,v,S,"double d,"h,B,e,g, "gun sights,"rho,w,d. Next the even groups of 4 Greek letters = alphabet and the odd Greek letters in groups 1,3,5,7 =numbers; B,4,9,1, "box,"O,L,U, 6,12,5,4, "omega,"O,P, S, F,22,P,5, C,N,S, "double d," 7,B,5,3, "gun sights,"R,O,D. Z,F, and F were treated like Greek letters(?). The double d =4/2 and 4/2= 2 and 2.The symbol omega =Z the signature. Then a possible rearrangement of the letters would be; SFPD=0 "gun sights=12 B672352 P.O.Box 44, Burson Cal. 95225 "Z"