Theodore John Kaczynski aka the "Unabomber" is a domestic terrorist and serial killer who between 1978 and 1995 killed 3 and wounded 23 others by attempting to start a nationwide combing campaign targeting people involved with modern technology. 

One page handwritten letter hand signed twice. The letter is hand dated August 13, 1999. Ted has hand signed at the top, Ted Kaczynsk and hand signed again at the close, With appreciation, Ted Kaczynski.

Includes the original prison mailed envelope with his complete return address postmarked August 13, 1999  and hand signed, Theodore John Kaczynski, with both his complete return address and the recipient's written by the Unabomber.

Ted Kaczynski Letter and Envelope Both Signed