Baker, Henry E. (November 14, 1903). "Inventions of the Negro". The Coloured American. Washington, D.C. page 3, col. 3 – via Library of Congress, Chronicling America. reprinted from The New York Evening Post (New York City)
Murray, Daniel (December 30, 1904). "Colour Problem in the United States". The Seattle Republican. Seattle, Washington. p. 2 – via Library of Congress, Chronicling America.