February 14, 1974 - San Francisco Chronicle

Mailed: February 14, 1974 

Postmarked: *Unknown*

Sent to: San Francisco Chronicle

Written on:  

Dear Mr. Editor, 

Did you Know that the 

initials SLAY (Symbionese 

Liberation Army) spell "sla", 

an old Norse word 

meaning "kill".

 a friend.

Image Source: https://www.zodiackiller.com/SLALetter.html

Image Source: https://www.zodiackiller.com/SLAEnvelope.html