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Walker, H. G. The Freedom Express. (Freedom, Okla.), Vol. 4, No. 5, Ed. 1 Thursday, May 13, 1909, newspaper, May 13, 1909; (https://gateway.okhistory.org/ark:/67531/metadc951164/m1/1/: accessed March 7, 2021), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .