S. R. Callaway to Adams, Oct. 19, 1886, UP, box 35, f. Aug. 11 - Oct. 86, LB, 53.
S. R. Callaway to Adams, Jan. 8, 1887, UP, box 47, f. 3;.
Adams to Callaway, March 29, 1886, UP, PO, OC, vol. 33, ser. 2, r. 28.
Testimony of Charles Francis Adams, April 29, 1887, PRC, 1:112.
Richard Orsi, Sunset Limited: The Southern Pacific Railroad and the Development of the American West, 1850-1930 (Berkeley: Univ. of California Press, 2005), 319-22.
Ninth Annual Report of the Board of Railroad Commissioners of the State of California for the Year Ending Dec. 31, 1888 (Sacramento: J. D. Young, 1889), 38.
"Union Pacific Rebates," New York Times, July 1, 1887, p. 5.
Klein, Union Pacific, 385, 592-99.