Title: Ted Kaczynski's Letter of Resignation from his Professorship at Berkeley
Author: Ted Kaczynski
Date: Jan. 20, 1969
Source: For context, quoting Ted from his book Truth versus Lies: "I was teaching at Berkeley only to get money to finance my project of going to live in the woods. I considered mathematicians to be very uninteresting people, and I felt I had nothing in common with them. To them, mathematics was Important, with a capital I, whereas to me it was only a game—a game with which I had become bored."

Dear Professor Addison:

This is to inform you that I am resigning at the end of this academic year. Thus I will not be returning in Fall, 1969.

Sincerely yours,
T. J. Kaczynski