The letter sent by Henry Kissinger to Harold Wilson on 18 March 1976.
Dear Harold,
The announcement of your decision to retire as Prime Minister has left me with a profound sense of loss. I have known you as long as any political leader in the world either in or out of office. In addition to the privilege of being associated with you in political life, I have always considered you a personal friend as well and have had, throughout these years, tremendous respect and admiration for your vision, dedication and leadership. We will miss you.
Warmest regards,
Henry A. Kissinger