Contents of the Collection The collection contains six handwritten letters ranging from February 26, 1869 to April 18, 1883 between William E. Boeing, Sr. (WEB) and his father, Wilhelm Böing. It is not always clear who is writing to whom in the letters, since father and son shared the same name. Additionally, not all of the letters have accompanying envelopes which could provide clarification based on the address. The letters are in German and have not been translated.