Herbert William Mullin early 1970's Santa Cruz, California serial killer serving life in prison for 13 murders he committed which he said were carried out to prevent earthquakes and further natural disasters. 
6 1/2" x 8 1/2" "Khieh = Self Restraint" illustration "Mandarin Calligraphy" hand signed on the back, Herbert Wm. Mullin.

Herbert Mullin Signed Khieh Self Restraint Illustration