Abstract William E. Boeing, Sr. (1881-1956) was an aviation pioneer and founded The Boeing Company in 1916. The collection holds textual materials, such as correspondence, philately, business-related materials, clippings, and ephemera, as well as photographs and illustrations related to his personal and business life, circa 1783-2008. Major areas of interest include family photographs and extensive personal and business-related correspondence.

Contents of the Collection The collection contains a single-page typed letter from G. C. Westervelt to P. N. Jansen of the Curtiss Engineering Corporation, dated June 3, 1919. The letter to "My Dear Jansen" expresses gratitude for Jansen's "oversight of the construction of NC Flying boats" and offers congratulations on the "success of the [Curtiss] NC-4." It is signed by G. C. Westervelt, Commander, United States Navy.