Letter to an unidentified person from "Wilhelm" (William E. Boeing), October 6, 1872. Four sheets, six handwritten pages on Office of Chas. L. Ortmann stationery, with envelope addressed to Wilhelm Böing in Westfalen, Germany.
Letter to "Wilhelm" (William E. Boeing) from Wilhelm Böing, June 23, 1874. Addressed to Mr. William Böing, care of Charles L. Ortmann, East Saginaw, Michigan. Two handwritten pages in German.
Letter to and from unidentified persons, April 18, 1883. Two handwritten pages on Wilhelm Boeing letterhead ("Wilhelm Boeing, Pine, Lands and Logs, Detroit, Mich.") and envelope addressed to William E. Boeing, Sr.
Letter to "Wilhelm" (William E. Boeing) from Wilhem Böing, November 6, 1872. Addressed to William E. Böing, care of Charles L. Ortmann, East Saginaw, Michigan. Three handwritten pages in German.