Susan Atkins aka Sadie Mae Glutz was a convicted murderer and member of the Charles Manson Family. Atkins was convicted of eight murders including that of actress Sharon Tate. Originally sentenced to death, her sentence was commuted in life in prison when the Supreme Court briefly overturned the death penalty. 
Atkins died of brain cancer on September 24, 2009.

Two page typed personal letter to a friend dated February 22, 1993 and hand signed, Susan. 
She mentions executed child killer, Westley Alan Dodd. Interesting letter in that Atkins mentions Doris Tate and in the last paragraph she tells her friend how Westley (killer Westley Alan Dodd) knew in his heart how much he was loved.
Includes the original prison mailed envelope.

Susan Atkins Letter Signed with Prison Envelope