Daniel Lewis, Iron Horse Imperialism: The Southern Pacific of Mexico, 1880-1951 (Tucson: Univ. of Arizona Press, 2007), 18-20.
"Statement of Chicago business to/from and through Denver Colonel during the year 1878," 33 1870 7.42-8.11, CB&Q.
Fred Wilbur Powell, The Railroads of Mexico (Boston: Stratford Company, 1921), 134.
H. Craig Miner, The St. Louis-San Francisco Transcontinental Railroad: The Thirty-fifth Parallel Project, 1853-1890 (Lawrence: Univ. Press of Kansas, 1972), 122.
Johnson and Supple, Boston Capitalists, 299, Strong quote 304.
Perkins to Forbes, June 30, 1880, J. M. Forbes, In-letters, private from C. E. Perkins, 3 F 3.2-3.3, CB&Q.
for Chicago, Grodinsky, Transcontinental Strategy, 194-95.
CPH to Crocker, Dec. 8, 1881, CPH Papers, vol. 29, ser. 2, r. 6.