Message sent to the White House, apparently in mid-June 1923, as quoted by Warren G. Harding in his June 21, 1923 speech in St. Louis. James W. Murphy, Speeches and Addresses of Warren G. Harding, President of the United States: Delivered During the Course of His Tour from Washington, D.C., to Alaska and Return to San Francisco, June 20 to August 2, 1923, Washington, DC: U.S. Government Printing Office, 1923, p. 46.https://en.wikiquote.org/wiki/Benito_Mussolini