These 'codes' were found in the book 'Moby Dick' using the same method.
The following assassinations were predicted by Moby Dick :
Prime Minister Indira Gandhi
President Rene Moawad (incredibly the Moby Dick code reads 'an exploding bomb' which is how he actually died)
Leon Trotsky (Trotsky was murdered with an ice pick. The Codes read, ice, hammer, executed, the steel head of the lance.)
Martin Luther King (to be killed by them, prepare for death, gun, agents deed)
Chancellor Engelbert Dollfuss (gun, Wien, assassination of a good fellow ... Dollfuss was shot by a gun in Wien, another prediction right on the nose, courtesy of Moby)
Sirhan Sirhan (the murderer of Robert Kennedy, a very complex set of codes, see it yourself).
John F. Kennedy (among other things the code mentions that Kennedy was shot in the head by rifle used by a concealed assassin).