Circular letters were not permitted. On July 12, 1940, it was decreed that forbid civilians “to send publications of any kind to members of the armed forces.”[1] Bonhoeffer and his close friend, Eberhard Bethge produced all the Finkenwalde circular letters on a typewriter, “circumventing the decree by sending them as personal letters. By using carbon copies, they were able to speed the process along. The name of each addressee was written by hand at the beginning, and Bonhoeffer signed each letter.”[2]


[1] Brocker, ed., Dietrich Bonhoeffer Works, Volume 16; Dietrich Bonhoeffer: Conspiracy and Imprisonment, 1940-1945, 8

[2] Brocker, ed., Dietrich Bonhoeffer Works, Volume 16; Dietrich Bonhoeffer: Conspiracy and Imprisonment, 1940-1945, 4.