TLS, one page, 8.5 x 11, personal letterhead, March 23, 1916. Letter to Alan R. Hawley of the National Aeroplane Defense Fund, in part: "I find that my financial manager, Mrs. Bell, has been ahead of me in writing you with regard to the contribution of $250 to the National Aeroplane Fund. My contributions to the cause of aviation, in the support of the Aerial Experiment Association, have exceeded forty five thousand dollars and just now we feel that it will not be convenient to contribute further. You know that my interest is always with the movement." In fine condition, with two small areas of minor paper loss. The Aerial Experiment Association was formed in 1907 under Graham Bell's leadership, and the group introduced several key technical innovations, including wingtip ailerons and the tricycle landing gear. A significant letter by one of the most innovative minds of his time.
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